The document discusses the human digestive system. It describes the major components of food and the process of digestion. The human digestive system includes the oral cavity, esophagus, stomach, small intestine, large intestine and associated digestive glands. The document outlines the structure and function of each part of the digestive tract and the enzymes involved in breaking down carbohydrates, proteins and lipids into smaller molecules that can be absorbed in the small intestine.
The organs of the male reproductive system include the
testes, a system of ducts (including the epididymis, ductus deferens,ejaculatory ducts, and urethra).
accessory sex glands (seminal vesicles, prostate, and bulbourethral glands),
several supporting structures, including the scrotum and the penis.
The testes (male gonads) produce sperm and secrete hormones.
The duct system transports and stores sperm, assists in their maturation, and conveys them to the exterior.
Semen contains sperm plus the secretions provided by the accessory sex glands.
The supporting structures have various functions. The penis delivers sperm into the female reproductive tract and the scrotum supports the testes.
This document provides information about cell structure and organization. It discusses the key components and features of prokaryotic and eukaryotic cells. Some of the main points covered include:
- Prokaryotic cells like bacteria have no nucleus or membrane-bound organelles. They have a cell envelope, cytoplasm, ribosomes, and a nucleoid containing DNA.
- Eukaryotic cells contain membrane-bound organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi bodies, lysosomes, and vacuoles. Their genetic material is contained within the nucleus.
- Cell membranes are semipermeable and made of a phospholipid bilayer. They regulate the passage of materials
The male reproductive system consists of external and internal genitalia. The external genitalia include the scrotum and penis, while the internal genitalia include the testes, vas deferens, seminal vesicles, prostate, and bulbourethral glands. The testes produce sperm and the hormone testosterone. Within the testes are seminiferous tubules containing spermatogenic cells such as spermatogonia and Sertoli cells that support sperm production through spermatogenesis, which takes approximately 64 days to complete in humans.
The male reproductive system consists of both primary and secondary organs. The primary organs are the testes, which produce sperm and the hormone testosterone. Secondary organs include ducts like the epididymis and vas deferens that transport sperm, as well as accessory glands like the seminal vesicles and prostate gland that provide fluids to nourish and protect sperm. The external genitalia are the penis and scrotum. The primary roles of the male reproductive system are production and transportation of sperm and depositing sperm in the female reproductive tract during sexual intercourse.
The menstrual cycle/ female reproductive cycleRani Gurudasani
The menstrual cycle consists of three phases - the menstrual, proliferative, and secretory phases. During the menstrual phase, the endometrium sheds if ovulation did not occur. In the proliferative phase, the endometrium thickens under rising estrogen levels. Ovulation occurs near the end of this phase. In the secretory phase, the corpus luteum secretes progesterone to prepare the endometrium for potential implantation. The cycle is regulated by changes in hormone levels and typically lasts around 28 days but can vary between individuals. Abnormalities include changes in cycle length, bleeding amount, or timing of menses.
- Griffith's experiment in 1928 showed that genetic material from heat-killed pathogenic bacteria could transform harmless bacteria into pathogenic ones, which he called the "transforming principle".
- Avery, Macleod, and McCarty's experiment in 1944 proved that DNA is the genetic material by showing that only DNA, and not other molecules, was able to transform bacteria.
- Hershey and Chase's experiment in 1952, using radioactive isotopes, demonstrated that DNA, not protein, enters a bacterial cell during viral infection, proving that DNA is the genetic material.
The organs of the male reproductive system include the
testes, a system of ducts (including the epididymis, ductus deferens,ejaculatory ducts, and urethra).
accessory sex glands (seminal vesicles, prostate, and bulbourethral glands),
several supporting structures, including the scrotum and the penis.
The testes (male gonads) produce sperm and secrete hormones.
The duct system transports and stores sperm, assists in their maturation, and conveys them to the exterior.
Semen contains sperm plus the secretions provided by the accessory sex glands.
The supporting structures have various functions. The penis delivers sperm into the female reproductive tract and the scrotum supports the testes.
This document provides information about cell structure and organization. It discusses the key components and features of prokaryotic and eukaryotic cells. Some of the main points covered include:
- Prokaryotic cells like bacteria have no nucleus or membrane-bound organelles. They have a cell envelope, cytoplasm, ribosomes, and a nucleoid containing DNA.
- Eukaryotic cells contain membrane-bound organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi bodies, lysosomes, and vacuoles. Their genetic material is contained within the nucleus.
- Cell membranes are semipermeable and made of a phospholipid bilayer. They regulate the passage of materials
The male reproductive system consists of external and internal genitalia. The external genitalia include the scrotum and penis, while the internal genitalia include the testes, vas deferens, seminal vesicles, prostate, and bulbourethral glands. The testes produce sperm and the hormone testosterone. Within the testes are seminiferous tubules containing spermatogenic cells such as spermatogonia and Sertoli cells that support sperm production through spermatogenesis, which takes approximately 64 days to complete in humans.
The male reproductive system consists of both primary and secondary organs. The primary organs are the testes, which produce sperm and the hormone testosterone. Secondary organs include ducts like the epididymis and vas deferens that transport sperm, as well as accessory glands like the seminal vesicles and prostate gland that provide fluids to nourish and protect sperm. The external genitalia are the penis and scrotum. The primary roles of the male reproductive system are production and transportation of sperm and depositing sperm in the female reproductive tract during sexual intercourse.
The menstrual cycle/ female reproductive cycleRani Gurudasani
The menstrual cycle consists of three phases - the menstrual, proliferative, and secretory phases. During the menstrual phase, the endometrium sheds if ovulation did not occur. In the proliferative phase, the endometrium thickens under rising estrogen levels. Ovulation occurs near the end of this phase. In the secretory phase, the corpus luteum secretes progesterone to prepare the endometrium for potential implantation. The cycle is regulated by changes in hormone levels and typically lasts around 28 days but can vary between individuals. Abnormalities include changes in cycle length, bleeding amount, or timing of menses.
- Griffith's experiment in 1928 showed that genetic material from heat-killed pathogenic bacteria could transform harmless bacteria into pathogenic ones, which he called the "transforming principle".
- Avery, Macleod, and McCarty's experiment in 1944 proved that DNA is the genetic material by showing that only DNA, and not other molecules, was able to transform bacteria.
- Hershey and Chase's experiment in 1952, using radioactive isotopes, demonstrated that DNA, not protein, enters a bacterial cell during viral infection, proving that DNA is the genetic material.
The male reproductive system includes the penis, scrotum, testes, epididymis, vas deferens, prostate, and seminal vesicles. The penis and the urethra are part of the urinary and reproductive systems.
The document discusses the male reproductive system and spermatogenesis. It describes the major structures of the male reproductive system including the testes, duct system, and accessory glands. It then focuses on the microscopic structure and function of the seminiferous tubules where spermatogenesis occurs. Spermatogenesis is the process by which spermatogonia differentiate and develop into spermatozoa through spermatocytogenesis, meiosis, and spermiogenesis within the seminiferous tubules of the testes. Sertoli and germ cells are also described in detail for their roles in supporting spermatogenesis.
The reproductive system or genital system is a system of organs within an organism which work together for the purpose of reproduction.
The reproductive events in human includes formation of gametes (gametogenesis) i.e sperms in males and ovum in females leading to the formation of zygote.
The male reproductive system includes the testes, which produce sperm and testosterone. The testes are located in the scrotum outside of the body to regulate temperature for sperm production. During ejaculation, sperm travel from the testes through the vas deferens, seminal vesicles, prostate, and urethra, where semen containing sperm is expelled through the penis. The penis contains erectile tissue that fills with blood to cause an erection, which is needed for sexual intercourse and ejaculation.
The digestive system breaks down food through mechanical and chemical digestion to extract nutrients for absorption. It involves both organs of the gastrointestinal tract - the mouth, esophagus, stomach, small intestine, large intestine - and accessory organs like the liver, gallbladder and pancreas. Food is ingested, broken down through peristalsis, enzymes, and absorption of nutrients occurs in the small intestine. Indigestible waste is eliminated as feces.
This document discusses cartilage and bone. It defines cartilage as a specialized connective tissue that functions as a supporting or weight-bearing tissue. There are three main types of cartilage: hyaline, elastic, and fibrocartilage. Bone is a highly vascularized living tissue with a calcified matrix. It provides structure and support for the body. The document outlines the basic components, cells, and structures of both cartilage and bone in detail.
The document describes the key parts of the female reproductive system including internal organs like the ovaries, oviducts, uterus, and vagina as well as external genitalia. It provides details on the ovaries and ovarian follicles, discussing their development from primordial to secondary to graafian follicles. It explains ovulation, the formation and role of the corpus luteum, and the ovarian and hormonal cycles. Key points are summarized around follicular development and atresia, ovulation, the corpus luteum, and the oviduct's role in transporting the ovum and embryo.
The document defines key terms related to early embryonic development including the ovary, fallopian tube, uterus, fertilization, zygote, cleavage, morula, and blastula. It explains that a blastocyst is a hollow ball of cells formed after cleavage and morula stages. During the second week, cells in the blastocyst wall begin to fold inward through the process of gastrulation, forming three distinct cell layers - endoderm, mesoderm, and ectoderm - and starting the specialization of cells through differentiation. By day 21, the amnion and chorion have formed embryonic membranes, with the chorion and uterine lining forming the placenta to allow nutrient exchange between the
The document summarizes the processes of fertilization, gametogenesis, implantation, and early embryonic development. It begins by describing fertilization as the union of an egg and sperm in the fallopian tube, forming a zygote. It then discusses gametogenesis, the formation of male and female gametes, including oogenesis and spermatogenesis. The next stages covered are implantation of the blastocyst in the uterus and formation of the placenta and fetal membranes. The document concludes by outlining the differentiation of the inner cell mass into the three germ layers and the formation of the amniotic cavity and yolk sac in early embryonic development.
The document provides information about the human reproductive system. It discusses that reproduction allows organisms to produce offspring similar to themselves. The male and female reproductive systems both contribute gametes - sperm and eggs respectively - which can unite during fertilization. The male system produces sperm in the testes and transports it, while the female system produces eggs and supports gestation and birth. The parts of each system are described in detail, including their functions in fertilization and development.
The human neural system is divided into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS includes the brain and spinal cord for information processing and control, while the PNS comprises nerves associated with the CNS. Nerve fibers of the PNS are afferent (transmit impulses to the CNS) and efferent (transmit impulses from the CNS). The PNS is further divided into the somatic and autonomic systems. Neurons are the basic structural and functional units, composed of a cell body, dendrites, and axon. Impulses are generated and conducted along neurons when the membrane becomes permeable to ions, then restored to its
The female reproductive system consists of internal and external organs that work together to produce eggs, facilitate fertilization and pregnancy, and nourish infants. The internal organs include the uterus, ovaries, fallopian tubes, and vagina. The ovaries produce eggs and hormones, the fallopian tubes transport eggs to the uterus, and the uterus houses and nourishes an embryo. The external genitalia include the vagina and breasts. The vagina receives sperm and acts as the birth canal, while the breasts produce milk to nourish newborns.
A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell. The nucleus is a structure inside the cell that contains the nucleolus and most of the cell's DNA. It is also where most RNA is made.
The urinary system consists of the kidneys, ureters, urinary bladder and urethra. The kidneys filter the blood to remove wastes and produce urine. The nephron is the functional unit of the kidney that filters blood and forms urine. Urine passes from the kidneys through the ureters into the bladder, and is then emptied through the urethra. Urine formation involves glomerular filtration, tubular reabsorption and secretion, and a countercurrent mechanism in the kidney. The urinary system regulates water and electrolyte balance and removes nitrogenous wastes from the body.
The document discusses the process of digestion in humans. It describes the major organs that make up the digestive system, including the mouth, esophagus, stomach, small intestine, large intestine, and accessory digestive glands like the liver, pancreas, and salivary glands. It explains the functions of these organs in breaking down food and absorbing nutrients.
The document summarizes the key components of the male reproductive system. It describes the testes, which produce sperm and hormones; the duct system, which transports sperm; and accessory sex glands, which secrete fluids that compose semen. It also explains sperm development through spermatogenesis, and the hormonal regulation of sperm production and male characteristics by hormones like testosterone and follicle-stimulating hormone.
The document provides an overview of the human digestive system, including its organs and their functions. It describes the process of digestion beginning with chewing in the mouth and continuing through the alimentary canal. Key organs discussed include the mouth, esophagus, stomach, small intestine, large intestine, and accessory organs like the liver, gallbladder and pancreas. The document explains the roles of these organs in further breaking down food, absorbing nutrients into blood and eliminating waste.
Cleavage, implantation of the embryo and bilaminarRobinson Wafula
1. Cleavage is the initial phase of rapid cell division of the zygote following fertilization which generates a large number of cells without growth. This leads to the formation of a solid ball of cells called a morula.
2. Implantation of the blastocyst in the uterine lining begins around day 7. The trophoblast cells erode into the endometrium and the blastocyst is fully embedded by day 10.
3. By the end of the second week, a bilaminar embryonic disc called the bilaminar disc forms consisting of the epiblast and hypoblast cell layers. This gives rise to the three germ layers.
The document discusses the human digestive system. It describes the major components of food and the process of digestion. The major parts of the digestive system are named and their functions outlined, including the mouth, esophagus, stomach, small intestine, large intestine, and associated digestive glands like the liver, pancreas and salivary glands. Key enzymes produced by these glands that break down carbohydrates, proteins and lipids are also mentioned.
Introduction to Gastrointestinal Physiology CUZ.pptxMercyDaka3
The document provides an introduction to gastrointestinal physiology, covering the following key points:
- The gastrointestinal tract (GIT) obtains nutrients from the external environment, breaks down particles, and transfers materials to the blood and cells. It includes the oral cavity, esophagus, stomach, and intestines.
- Accessory organs that aid digestion include the salivary glands, pancreas, liver, and gallbladder.
- The four main layers of the GIT wall from lumen to outer layer are the mucosa, submucosa, muscularis layer, and serosa. The mucosa contains villi and glands and absorbs nutrients. Peristalsis is controlled by the muscularis
The male reproductive system includes the penis, scrotum, testes, epididymis, vas deferens, prostate, and seminal vesicles. The penis and the urethra are part of the urinary and reproductive systems.
The document discusses the male reproductive system and spermatogenesis. It describes the major structures of the male reproductive system including the testes, duct system, and accessory glands. It then focuses on the microscopic structure and function of the seminiferous tubules where spermatogenesis occurs. Spermatogenesis is the process by which spermatogonia differentiate and develop into spermatozoa through spermatocytogenesis, meiosis, and spermiogenesis within the seminiferous tubules of the testes. Sertoli and germ cells are also described in detail for their roles in supporting spermatogenesis.
The reproductive system or genital system is a system of organs within an organism which work together for the purpose of reproduction.
The reproductive events in human includes formation of gametes (gametogenesis) i.e sperms in males and ovum in females leading to the formation of zygote.
The male reproductive system includes the testes, which produce sperm and testosterone. The testes are located in the scrotum outside of the body to regulate temperature for sperm production. During ejaculation, sperm travel from the testes through the vas deferens, seminal vesicles, prostate, and urethra, where semen containing sperm is expelled through the penis. The penis contains erectile tissue that fills with blood to cause an erection, which is needed for sexual intercourse and ejaculation.
The digestive system breaks down food through mechanical and chemical digestion to extract nutrients for absorption. It involves both organs of the gastrointestinal tract - the mouth, esophagus, stomach, small intestine, large intestine - and accessory organs like the liver, gallbladder and pancreas. Food is ingested, broken down through peristalsis, enzymes, and absorption of nutrients occurs in the small intestine. Indigestible waste is eliminated as feces.
This document discusses cartilage and bone. It defines cartilage as a specialized connective tissue that functions as a supporting or weight-bearing tissue. There are three main types of cartilage: hyaline, elastic, and fibrocartilage. Bone is a highly vascularized living tissue with a calcified matrix. It provides structure and support for the body. The document outlines the basic components, cells, and structures of both cartilage and bone in detail.
The document describes the key parts of the female reproductive system including internal organs like the ovaries, oviducts, uterus, and vagina as well as external genitalia. It provides details on the ovaries and ovarian follicles, discussing their development from primordial to secondary to graafian follicles. It explains ovulation, the formation and role of the corpus luteum, and the ovarian and hormonal cycles. Key points are summarized around follicular development and atresia, ovulation, the corpus luteum, and the oviduct's role in transporting the ovum and embryo.
The document defines key terms related to early embryonic development including the ovary, fallopian tube, uterus, fertilization, zygote, cleavage, morula, and blastula. It explains that a blastocyst is a hollow ball of cells formed after cleavage and morula stages. During the second week, cells in the blastocyst wall begin to fold inward through the process of gastrulation, forming three distinct cell layers - endoderm, mesoderm, and ectoderm - and starting the specialization of cells through differentiation. By day 21, the amnion and chorion have formed embryonic membranes, with the chorion and uterine lining forming the placenta to allow nutrient exchange between the
The document summarizes the processes of fertilization, gametogenesis, implantation, and early embryonic development. It begins by describing fertilization as the union of an egg and sperm in the fallopian tube, forming a zygote. It then discusses gametogenesis, the formation of male and female gametes, including oogenesis and spermatogenesis. The next stages covered are implantation of the blastocyst in the uterus and formation of the placenta and fetal membranes. The document concludes by outlining the differentiation of the inner cell mass into the three germ layers and the formation of the amniotic cavity and yolk sac in early embryonic development.
The document provides information about the human reproductive system. It discusses that reproduction allows organisms to produce offspring similar to themselves. The male and female reproductive systems both contribute gametes - sperm and eggs respectively - which can unite during fertilization. The male system produces sperm in the testes and transports it, while the female system produces eggs and supports gestation and birth. The parts of each system are described in detail, including their functions in fertilization and development.
The human neural system is divided into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS includes the brain and spinal cord for information processing and control, while the PNS comprises nerves associated with the CNS. Nerve fibers of the PNS are afferent (transmit impulses to the CNS) and efferent (transmit impulses from the CNS). The PNS is further divided into the somatic and autonomic systems. Neurons are the basic structural and functional units, composed of a cell body, dendrites, and axon. Impulses are generated and conducted along neurons when the membrane becomes permeable to ions, then restored to its
The female reproductive system consists of internal and external organs that work together to produce eggs, facilitate fertilization and pregnancy, and nourish infants. The internal organs include the uterus, ovaries, fallopian tubes, and vagina. The ovaries produce eggs and hormones, the fallopian tubes transport eggs to the uterus, and the uterus houses and nourishes an embryo. The external genitalia include the vagina and breasts. The vagina receives sperm and acts as the birth canal, while the breasts produce milk to nourish newborns.
A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell. The nucleus is a structure inside the cell that contains the nucleolus and most of the cell's DNA. It is also where most RNA is made.
The urinary system consists of the kidneys, ureters, urinary bladder and urethra. The kidneys filter the blood to remove wastes and produce urine. The nephron is the functional unit of the kidney that filters blood and forms urine. Urine passes from the kidneys through the ureters into the bladder, and is then emptied through the urethra. Urine formation involves glomerular filtration, tubular reabsorption and secretion, and a countercurrent mechanism in the kidney. The urinary system regulates water and electrolyte balance and removes nitrogenous wastes from the body.
The document discusses the process of digestion in humans. It describes the major organs that make up the digestive system, including the mouth, esophagus, stomach, small intestine, large intestine, and accessory digestive glands like the liver, pancreas, and salivary glands. It explains the functions of these organs in breaking down food and absorbing nutrients.
The document summarizes the key components of the male reproductive system. It describes the testes, which produce sperm and hormones; the duct system, which transports sperm; and accessory sex glands, which secrete fluids that compose semen. It also explains sperm development through spermatogenesis, and the hormonal regulation of sperm production and male characteristics by hormones like testosterone and follicle-stimulating hormone.
The document provides an overview of the human digestive system, including its organs and their functions. It describes the process of digestion beginning with chewing in the mouth and continuing through the alimentary canal. Key organs discussed include the mouth, esophagus, stomach, small intestine, large intestine, and accessory organs like the liver, gallbladder and pancreas. The document explains the roles of these organs in further breaking down food, absorbing nutrients into blood and eliminating waste.
Cleavage, implantation of the embryo and bilaminarRobinson Wafula
1. Cleavage is the initial phase of rapid cell division of the zygote following fertilization which generates a large number of cells without growth. This leads to the formation of a solid ball of cells called a morula.
2. Implantation of the blastocyst in the uterine lining begins around day 7. The trophoblast cells erode into the endometrium and the blastocyst is fully embedded by day 10.
3. By the end of the second week, a bilaminar embryonic disc called the bilaminar disc forms consisting of the epiblast and hypoblast cell layers. This gives rise to the three germ layers.
The document discusses the human digestive system. It describes the major components of food and the process of digestion. The major parts of the digestive system are named and their functions outlined, including the mouth, esophagus, stomach, small intestine, large intestine, and associated digestive glands like the liver, pancreas and salivary glands. Key enzymes produced by these glands that break down carbohydrates, proteins and lipids are also mentioned.
Introduction to Gastrointestinal Physiology CUZ.pptxMercyDaka3
The document provides an introduction to gastrointestinal physiology, covering the following key points:
- The gastrointestinal tract (GIT) obtains nutrients from the external environment, breaks down particles, and transfers materials to the blood and cells. It includes the oral cavity, esophagus, stomach, and intestines.
- Accessory organs that aid digestion include the salivary glands, pancreas, liver, and gallbladder.
- The four main layers of the GIT wall from lumen to outer layer are the mucosa, submucosa, muscularis layer, and serosa. The mucosa contains villi and glands and absorbs nutrients. Peristalsis is controlled by the muscularis
The document discusses the human digestive system. It begins with the mouth and ends with the anus. The major organs are the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum and anus. Accessory organs include the liver, salivary glands, gallbladder and pancreas. The digestive process involves ingestion, mechanical and chemical digestion, absorption, assimilation and excretion. Food is broken down and nutrients are absorbed and transported to cells to be used for energy and growth.
The digestive system breaks down food and absorbs nutrients. It includes the mouth, esophagus, stomach, small intestine, large intestine, liver, pancreas and gallbladder. The mouth chews food, the stomach acids break it down and the small intestine further breaks it down and absorbs nutrients using enzymes from the pancreas and bile from the liver. The large intestine absorbs water and passes waste to the rectum to be eliminated. Accessory organs like the liver, pancreas and gallbladder produce enzymes and bile to aid digestion.
The document describes the main organs and functions of the human digestive system. It begins with an overview of the gastrointestinal tract and lists the major organs as the mouth, esophagus, stomach, small intestine, large intestine, liver, gallbladder and pancreas. It then provides more detail on the roles and structures of each organ, including how they contribute to ingestion, digestion, absorption and elimination. The key functions of digestion include mechanical and chemical breakdown of food as well as nutrient absorption in the small intestine.
The digestive system is composed of the gastrointestinal tract and accessory organs. The gastrointestinal tract is a continuous tube extending from the mouth to the anus. It includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. Accessory organs include the teeth, tongue, salivary glands, liver, gallbladder and pancreas. The digestive system functions to ingest, digest, absorb, and egest food and liquid. Digestion involves both mechanical and chemical breakdown of food.
The human digestive system consists of the alimentary canal and digestive glands. The alimentary canal runs from the mouth to the anus and contains structures like the esophagus, stomach, and small and large intestines. Digestive glands include the salivary glands, liver, and pancreas. Digestion involves both mechanical and chemical breakdown of food. Enzymes and acids in saliva, gastric juice, bile, and pancreatic juice chemically break down food into small molecules that can be absorbed in the small intestine and used by the body.
The digestive system involves breaking down food for absorption. It begins at the mouth and passes through the esophagus, stomach, and small and large intestines, ending at the anus. The digestive system uses both mechanical and chemical processes to break down food. Mechanical digestion is carried out by the mouth and churning of the stomach and intestines. Chemical digestion involves enzymes secreted by glands that break food into molecules that can be absorbed.
The document provides an overview of the digestive system, including its components and functions. It discusses the mouth, salivary glands, esophagus, stomach, and small and large intestines. It describes the layers of the gastrointestinal tract and control mechanisms. The stomach is highlighted, including its roles in storage, mechanical and chemical processing, and secretion of acids and enzymes. Control of gastric activity through neural, hormonal and local responses is also summarized.
The document summarizes the digestive system of poultry. It describes the different parts of the digestive tract including the mouth, esophagus, crop, proventriculus, gizzard, small intestine, ceca, large intestine, and cloaca. It also discusses accessory digestive glands like the salivary glands, liver, and pancreas that secrete enzymes to aid digestion. The digestive system breaks down feed into smaller molecules that can be absorbed and used by the body.
The complete process of digestion, digestive trackwizardxking2014
The document summarizes the key components and functions of the human digestive system. It describes the six main functions of the digestive system as ingestion, secretion, motility, digestion, absorption, and defecation. It then outlines the organs that make up the gastrointestinal tract (oral cavity, esophagus, stomach, small intestine, large intestine) and accessory organs (liver, gallbladder, pancreas). For each section of the digestive tract, it details the mechanical and chemical digestion processes that occur.
The digestive system of Pila consists of an alimentary canal and four major digestive glands: salivary glands, hepatopancreas (liver), oesophageal pouches, and buccal glands. The salivary glands secrete mucus and enzymes to break down starch in the buccal cavity. The hepatopancreas is the main digestive gland, containing cells that secrete enzymes to digest cellulose and proteins and resorptive cells that digest proteins intracellularly. The oesophageal pouches and buccal glands also secrete digestive enzymes. Undigested waste is egested through the anus.
This document provides an overview of the digestive system, including both the gastrointestinal tract and accessory digestive organs. It discusses the structure and function of the mouth, stomach, small intestine, large intestine, liver, pancreas and salivary glands. Key points covered include the roles of enzymes, hormones and nerves in breaking down food and absorbing nutrients throughout the digestive process.
Essential of the digestive system_physiologynurafiqah123
The digestive system is divided into the alimentary tube and accessory organs. The alimentary tube extends from the mouth to the anus and includes the oral cavity, esophagus, stomach, and intestines. Accessory organs include the teeth, tongue, salivary glands, liver, gallbladder and pancreas. Digestion involves both mechanical and chemical breakdown of food. Mechanical digestion is the physical breakdown of food while chemical digestion uses enzymes to break down molecules. Digestion begins in the mouth and continues through the stomach and small intestine where nutrients are absorbed and transported to the liver before entering circulation. Undigested material then moves to the large intestine where water is absorbed before waste is eliminated.
This document describes digestion that occurs in the mouth, esophagus, stomach, and small intestine. In the mouth, food is mechanically and chemically broken down by teeth and saliva enzymes. The chewed food or bolus is then swallowed through the esophagus using peristalsis. In the stomach, the bolus is further broken down by stomach muscles and enzymes in gastric juice. When fully digested, the liquid chyme exits the stomach into the small intestine where bile, pancreatic juice, and bicarbonate aid in further digestion before nutrients are absorbed in the jejunum and ileum.
The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. ... The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus.
The document provides an overview of the main organs and functions of the human digestive system. It describes the process of digestion beginning in the mouth and continuing through the esophagus, stomach, small intestine, large intestine, and ending at the anus. Accessory organs that aid digestion such as the teeth, tongue, salivary glands, liver, gallbladder and pancreas are also outlined. Each organ's role in breaking down food, absorbing nutrients, and eliminating waste is detailed. Common digestive issues are listed and the overall digestive process is reviewed through diagrams and a video.
The digestive system breaks down ingested food into nutrients that can be absorbed and used by the body. It consists of the gastrointestinal tract including the mouth, esophagus, stomach, small and large intestines, and accessory organs like the liver, pancreas, and gallbladder. Food is ingested, mechanically and chemically broken down, absorbed in the small intestine, and waste is eliminated. The digestive system works through peristalsis, secretion of enzymes, and absorption of nutrients. Common digestive disorders include gastroenteritis, ulcers, appendicitis, hepatitis, and cirrhosis of the liver. Irritable bowel syndrome and constipation are also linked to mental health issues like depression and anxiety through the gut
Similar to digestionandabsorption-141122205848-conversion-gate02.pdf (20)
This document provides an overview of prana and pranayama from classical yoga texts. It defines prana as the vital life force that sustains all of creation. Pranayama practices were developed by yogis to access the pranic field for balancing the body and controlling the mind to attain higher states of consciousness. The three stages of pranayama - inhalation, retention and exhalation - are used in different permutations and directions to produce various pranayama techniques. Pranayama aims to clear blockages in the nadis (energy channels) and awaken the chakras to utilize our full energy, mind and consciousness potential.
The document discusses core muscles and core stability. It defines the core as the center of the body that functions to stabilize the trunk during movement. The core includes muscles of the hips, torso, and shoulders. A strong, stable core is important for preventing injuries and improving performance by allowing the efficient transfer of force throughout the body. Rather than exercises like crunches that involve large ranges of motion, functional exercises are recommended to enhance core stability, including planks, Russian twists, and alternating heel touches. Proper form and technique are important when building core stability.
The document discusses the concept and components of physical fitness. Physical fitness is defined as the ability to perform tasks efficiently without undue fatigue and with extra reserve. The main components of physical fitness are cardiovascular endurance, body composition, flexibility, muscular endurance, and muscular strength. Additional components include speed, agility, balance, coordination, reaction time, and power. Each component is defined and examples are provided to illustrate how they relate to physical activities and sports.
This document defines and provides examples of the 12 components of fitness: agility, balance, cardio-vascular endurance, co-ordination, flexibility, muscular endurance, power, reaction time, speed, strength, static balance, and dynamic balance. It categorizes them as either health-related components (cardio-vascular endurance, muscular endurance, strength, flexibility, body type) or sport-related components (agility, speed, reaction time, balance, co-ordination, power) and provides definitions and examples for each component. The document concludes with homework assignments applying the components to specific sports.
This document discusses muscular strength and endurance. It defines muscular strength as the amount of force one can exert and muscular endurance as the number of times one can lift a weight without fatigue. It notes benefits like improved body composition, bone density, injury prevention, quality of life, and enhanced self-image. Additionally, it distinguishes between static and dynamic exercises as well as concentric and eccentric muscle contractions.
This document discusses two types of muscle contractions: isometric and isotonic exercises. Isometric exercises involve muscle contractions without shortening or movement of the muscle, while isotonic exercises involve muscle contractions and movement. Some examples of isometric exercises provided are quadriceps and hamstring sets, shoulder internal rotation, neck exercises, hip abduction, and planks. Isotonic exercises allow for continuous movement of muscles and joints using equipment like weights or resistance bands. Benefits of both types of exercises include improved strength, posture, circulation and bone density.
Karma Yoga refers to the path of union with God through selfless action. It involves detaching oneself from the fruits of actions and offering them to God, which helps purify the heart and sublimate the ego. According to the Bhagavad Gita, Karma Yoga is the selfless devotion of inner and outer activities as a sacrifice to God. The law of karma states that every action produces a reaction and leaves an impression, and through Karma Yoga one can free themselves from these impressions and attain moksha.
The document discusses the basic concepts of yoga, including different definitions of yoga from spiritual, social, and scientific perspectives. It covers the origins and traditions of yoga throughout history. Key topics include the benefits of yoga for physical, mental, and spiritual health. Misconceptions about yoga are addressed. Vedic literature and the four paths of yoga - Raja, Jnana, Karma, and Bhakti - are also summarized.
The document provides information on various vitamins including their definitions, classifications, sources, characteristics, functions, and mechanisms of action. It discusses both water soluble vitamins (B vitamins and Vitamin C) and fat soluble vitamins (Vitamins A, D, E, K). Key groups discussed include the B complex vitamins, Vitamins C, A, D, E, and K.
This document describes a physical fitness test that assesses several components of fitness. The test measures body composition through weight, height, BMI and waist circumference tests. It evaluates flexibility with the sit and reach and zipper tests. Cardiovascular endurance is assessed using the step test. Muscle strength is tested through 90-degree pushups, curl-ups and other exercises. Speed, power and agility are measured in events like the 40-meter sprint, basketball pass, standing long jump, and hexagon agility test. The document provides materials, procedures and scoring for each component of the physical fitness assessment.
The document discusses the history and development of chocolate over centuries. It details how cocoa beans were first used by Mesoamerican cultures before being introduced to Europe where it became popular in powder and liquid forms. The document also notes that modern chocolate production emerged in the 19th century with innovations that helped mass produce chocolate bars and other candies.
This document discusses the importance of breathing and respiration from both a scientific and yogic perspective. It covers:
1) The role of the respiratory system in exchanging gases between the atmosphere, blood, and cells. Respiration occurs at the cellular and organism levels.
2) Yogic concepts of prana as the universal life force and different levels of pranic manifestation from minerals to humans. Pranayama involves controlling prana through breath control techniques.
3) Details of respiratory anatomy and the mechanics of breathing. It also discusses how pranayama techniques can balance the breath and expand awareness.
Posture is maintained through a balance of muscle contractions regulated by reflexes. The key reflex is the stretch reflex, where muscle spindles detect changes in muscle length and signal the spinal cord to contract or relax muscles. There are two types of postural reflexes - static and statokinetic. Static reflexes maintain posture against gravity, while statokinetic reflexes allow for voluntary movement. Multiple areas of the central nervous system integrate these reflexes, including the spinal cord, brainstem, cerebellum and cerebral cortex. Vision and vestibular signals also provide important inputs. Together this network allows humans to maintain an upright stance through low levels of continuous muscle contraction adjusted by reflexes.
This document discusses blood pressure measurement and hypotension/hypertension. It provides details on:
- The importance of accurately measuring blood pressure to assess conditions like hypotension and hypertension.
- The causes and symptoms of hypotension, including postural hypotension. Postural hypotension is a drop in blood pressure when moving from lying to standing.
- The causes and types of hypertension, including primary/essential hypertension which has no identifiable cause, and malignant hypertension which is a medical emergency.
The lymphatic system transports lymph fluid and assists the immune system. It is composed of lymphatic vessels, lymph nodes, the spleen, thymus, and lymphatic cells. Lymph fluid is collected from tissues by lymphatic capillaries and transported through a series of vessels, nodes, and ducts where it is filtered for pathogens. The system's immune cells help fight infection and disease. As the body ages, the thymus and immune response decline, making elderly people more susceptible to illness.
The document discusses the skeletal system, including bone structure and types, bone growth and metabolism, and the 206 bones that make up the human skeleton. It describes how bones provide structure, support, and protection. Compact and spongy bone are discussed. The roles of red and yellow bone marrow are summarized. Joints, ligaments, tendons, and muscles are also outlined. Assessment of the musculoskeletal system includes health history, physical exam of posture, gait, range of motion, and diagnostic tests such as x-rays. Common injuries like fractures, sprains, and strains are defined.
Authoring a personal GPT for your research and practice: How we created the Q...Leonel Morgado
Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...AbdullaAlAsif1
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
and the revised UWWTD (Urban Waste Water Treatment Directive)”
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
9. HETERODONT
• Teeth are different types or dissimilar
Incisors
Canine
Premolars
Molars
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10. DIPHYODONT
• Teeth appear twice in
the whole life
• Milk teeth
• Permanent teeth
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11. The kind and number of teeth are explained in the
form of formula is called dental formula.
• Adult 32
permanent teeth
• Incisors 2/2
• Canine 1/1
• Premolars 2/2
• Molars 3/3
• Child 20 milk
teeth
• Incisors 2/2
• Canine 1/1
• Premolars 0/0
• Molars 2/2
DENTAL FORMULA
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12. WISDOM TEETH
• Third molar appears
after the age of 20 years
and hence is called
wisdom teeth.
•12
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13. Odontoblast
Found in the dental
pulp secrete dentine
Crown
Neck
Root
STRUCTURE OF TOOTH
•13
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15. TONGUE
• The upper surface of
the tongue has small
projections called
papillae, some of
which bear taste
buds.
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16. PHARYNX
• Common passage for
digestive and
respiratory system.
• Opening of oesophagus
• Opening of larynx -
Glottis
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17. GLOTTIS
• Glottis is guarded by a
flap of tissue called
epiglottis.
• When food materials
pass through the
pharynx the epiglottis
closes the glottis.
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18. OESOPHAGUS
• Narrow muscular tube
• 30 cm long
• Leads to stomach
• Pass through the
diaphragm (a muscular
partition that separates
thorax from abdomen).
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19. OESOPHAGEAL SPHINCTER
(GASTRO OESOPHAGIAL SPHINCTER)
• Posterior region of the
oesophagus there is a
ring of muscle called
oesophagial sphincter.
• It controls the opening
of the oesophagus into
the stomach.
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20. PERISTALSIS
• The movement of food
materials in the
esophagus is effected
by the wave like
contraction and
relaxation of
longitudinal and circular
muscles of the
esophagus is known as
peristalsis.
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21. STOMACH
• Large muscular ‘J’
shaped sac.
• Lying just below the
diaphragm in the
abdominal cavity.
• Three major parts
– Cardiac
– Fundic
– Pyloric
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22. PYLORIC SPHINCTER
• The opening of the
stomach into the
duodenum is guarded
by pyloric sphincter.
• Controls the flow of
food to the intestine.
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23. SMALL INTESTINE
• Long, highly coiled,
narrow tube
• Seven metres long
• 2.5 cm diametre
• Divided in to
duodenum, jejunum &
ileum.
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24. DUODENUM
• First part of SI
• ‘U’ shaped
• Area of digestion
• Receives common
opening of the bile
and pancreatic duct.
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26. ILEUM
• Highly coiled
• Opens into the large
intestine
• Area of absorption
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27. LARGE INTESTINE
• 1.5 metres long
• Differentiated into
Caecum , Colon &
Rectum
•27
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28. CAECUM
• Small blind sac (at the
junction of SI &LI)
• Plays no role in Nutrient
absorption.
• It hosts some symbiotic
microorganisms.
• Caecum bears a finger like
out growth of unknown
function known as
Vermiform Appendix.
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31. HISTOLOGY OF HUMAN GUT
( Outer most )
forms a fibrous coat
(Inner most)-made of
secretary & absorptive cells
Loose connective tissue layer
with blood & lymph vessels
Smooth muscle
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32. RUGAE
• Mucosal layer forms
irregular fold in the
stomach called rugae.
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33. VILLI
• (Sing:- Villus)
• Mucosal layer forms
small finger like
folding in the small
intestine called Villi
• A villus is about 0.5 to
1 mm long
Villus
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•HSE Zoology blog
38. MICROVILLI
• Each villus has
numerous electron
microscopic
evaginations called
microvilli.
• Both villi & micro villi
increases the surface
area for digestion and
absorption of food
•38
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40. DIGESTIVE ENZYMES
• Hydrolyses
Group of enzymes
released from the cells
digestive system play a
major role in the extra
cellular digestion in
human
• Carbohydrase (
amylase ) carbohydrate
digesting
E.g.: ptyalin, maltose etc
• Proteases (protein
digesting)
Eg: amino peptidase,
dipeptidase
. Lipase (lipid digesting)
•40
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41. SALIVARY GLANDS
• Secrete saliva
• Found in buccal cavity
• Three pairs of salivary
glands
1.Parotid glands
(largest)
2.Sub lingual glands
3.Sub maxillary
(Sub mandibular)
•41
•HSE Zoology blog
42. SALIVA
• Derived from blood plasma
• Secrete 1.5 liters of saliva
per day
• Slightly alkaline
• Contain water & electrolyte
(Na+, K+, Cl-, HCO3
-)
• Mucin, ptyalin, lyzozyme &
inorganic salts
• Ptyalin digest starch in to
maltose
•42
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43. LIVER
• Largest gland in the
human body
• Weighs about 1.5 kg in
adult man
• Bi lobed
• Secrete bile
•43
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44. • Each lobe is separated
into numerous tiny
hepatic lobules, which are
the functional units.
• A lobule is formed of
numerous hepatic cells –
bile is secreted by hepatic
cells
• Each lobule is covered by
a thin connective tissue
sheath called Glisson’s
capsule
Glisson’s
capsule
LIVER
•44
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46. GALL BLADDER
• Bile is stored and
Concentrated in a thin
muscular sac called
gall bladder.
• Capacity- 40 – 60 ml
• Absent in whale,
horses, rats etc.
•46
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47. BILE
• Golden yellow or greenish fluid
• Alkaline nature
• Bile pigments (product of dead RBC) (biliverdin & bilirubin)
• Bile salts,
• cholesterol,
• phospholipids
• Bile salts play a very important role in the emulsification of fat
•47
•HSE Zoology blog
48. GALL BLADDER
• The duct of gall
bladder (cystic duct)
along with hepatic
duct from the liver
forms a common bile
duct.
•48
•HSE Zoology blog
49. GALL BLADDER
• The bile duct and
pancreatic duct opens
together into the
duodenum as common
hepato - pancreatic
duct, which is guarded
by a sphincter called
sphincter of Oddi.
Hepato - Pancreatic duct •49
•HSE Zoology blog
50. PANCREAS
• Located between stomach
& duodenum
• Second largest glands
• Heterocrine gland (both
exocrine &endocrine)
• Pancreatic duct opens into
the duodenum along with
bile duct
• Secrete pancreatic juice.
•50
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52. GASTRIC GLANDS
• Found on the wall of
stomach
• Formed of three kinds of
cells
1. Mucous cells
2. Chief cells or
Zymogen cells
3. Oxyntic cells
or Parital cells
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55. GASTRIC SECRETIONS
Name of Cell Function
Mucous cells (Goblet cells) Secrete mucous
Oxyntic cells or Parital cells
Secretion of HCl and intrensic
factor (factor essential for the
absorption of vitamin B12)
Chief cells or Zymogen cells
Secretion of enzymes such as
pepsin , rennin, lipase etc.
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56. • Inactivate the secretion of
salivary amylase.
• Kills micro organism
• Lowers the pH of the
stomach (1.5 to 2.5)
• Activate proenzyme
pepsinogen to active pepsin.
HCl
•56
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57. INTESTINAL GLANDS
• Simple tubular glands found throughout SI
• Two types
Crypts of Lieberkuhn
Glands of Brunner
•57
•HSE Zoology blog
58. CRYPTS OF LIEBERKUHN
• Goblet cells – Mucous secreting
• Paneth cells – Enzyme secreting
Many surface area of gastro intestinal tract are
lined by evaginations of the epithelium in to sub
mucosa similar to pits. These pits of the
intestine are called Crypts of Lieberkuhn
Paneth cells
Goblet cells
villus
crypt
•58
•HSE Zoology blog
59. GLANDS OF BRUNNER ( DUODENAL GLANDS)
• Confined to the sub
mucosa of the
duodenum and
secrete mucus only
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•HSE Zoology blog
61. DIGESTION
• The teeth and tongue with
the help of saliva masticate
and mix up the food into
bolus.
• The bolus is conveyed to
pharynx and then to
oesophagus by swallowing or
deglutition.
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•HSE Zoology blog
62. DIGESTION
• The stomach stores the food 4-5 hrs. The food
mixes thoroughly with acidic gastric juice to
form paste.- Chyme
chyme
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63. • Starch
Maltose
Buccal cavity
Starch Maltose
Salivary amylase
CARBOHYDRATE
DIGESTION
Stomach
No carbohydrate
digestion
Small Intestine
Starch Maltose
Maltose 2 Glucose
Lactose Glucose +
Galactose
Sucrose Glucose +
Fructose
P. amylase
Maltase
Lactase
Sucrase
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64. Buccal cavity
No protein digestion
Stomach
Pepsinogen Pepsin
HCl
Protein
Pepsin Peptones +
Proteoses
Peptones = larger peptides
Proteoses = smaller peptides
Small intestine
Trypsinogen Enterokinase Trypsin
Chymotrypsinogen Chymotrypsin
Procarboxy
peptidase
Carboxy
peptidase
Proteins
Peptones
Proteoses
Dipeptides
Dipeptides Amino acids
Dipeptidase
Trypsin / Chymotrypsin
Carboxy peptidase
PROTEIN DIGESTION
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65. Buccal cavity
No protein digestion
Stomach
Gastric lipase hydrolyses
only a small amount of
fat Small intestine
Fat Fat droplets
Bile
Emulsification
Fat
Pancreatic lipase
Fatty acids & Glycerol
Diglyceride
Monoglycerides
FAT DIGESTION
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•HSE Zoology blog
67. END PRODUCTS OF DIGESTION
Carbohydrates
Glucose
Fructose
Galactose
Proteins
Amino acids
Fats
Fatty acids
glycerol
•67
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68. • Complete digestion of
food take place in the
duodenum. The fully
digested food is semi
fluid in nature and is
known as Chyle
DIGESTION
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69. ABSORPTION OF DIGESTED PRODUCTS
• Absorption is the process by
which the end products of
digestion pass through the
intestinal mucosa
( transported through the
intestinal mucosa) into the
blood or lymph
• The end products of digestion
are absorbed in the jejunum
and ileum regions of small
intestine.
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70. Absorption is carried out by
– Passive transport
– Facilitated transport
– Active transport
ABSORPTION
•70
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71. PASSIVE TRANSPORT
• Small amounts of monosaccharide like glucose, amino acids,
and some of electrolytes like chloride ions are generally
absorbed by simple diffusion.
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•HSE Zoology blog
73. FACILITATED TRANSPORT
• Fructose and some
amino acids are
absorbed with the help
of carrier ions like
sodium. This
mechanism is called
facilitated transport.
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•HSE Zoology blog
74. ACTIVE TRANSPORT
• Requires energy
• Various nutrients like
amino acids,
monosaccharide like
glucose, electrolytes like
Na+ are reabsorbed into
the blood by active
transport.
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•HSE Zoology blog
76. ABSORPTION OF FAT
• Fatty acids and glycerol insoluble in water so they cannot be
absorbed directly from the lumen of the intestine.
• With the help of bile salts & phospholipids the fatty acids and
glycerol are converted into small spherical water soluble droplets
called micelles.
•76
•HSE Zoology blog
77. ABSORPTION OF FAT
Micelles are reformed into very small protein coated fat
globules called chylomicrons. Which are transported in to
the lymph vessels (lactales)in the villi.
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•HSE Zoology blog
79. LARGE INTESTINE
Functions
Absorption of water,
minerals and certain
drugs.
Secretion of mucus which
helps in adhering waste.
• No significant digestive
activity occurs in the
large intestine.
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80. LARGE INTESTINE
• The undigested and
unabsorbed substances
(faeces) enters into the
caecum of the large
intestine through the
ileo caecal valve, which
prevents the back flow
of faecal matter.
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81. EGESTION
• The egestion of faeces
to the outside through
the anal opening
(defaecation) is a
voluntary process and is
carried out by a mass
peristaltic movement.
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82. THE SUMMARY OF ABSORPTION IN DIFFERENT PARTS OF
DIGESTIVE SYSTEM
Oral cavity Stomach Small Intestine Large
Intestine
Certain drugs
coming in
contact with the
mucosa of the
mouth and
lower side of the
tongue are
absorbed into
the blood
capillaries lining
them.
Water, simple
sugars, alcohol
Glucose Fructose
Fatty acids
Glycerol
Amino acids
Water , some
minerals,
drugs
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83. DISORDERS OF DIGESTIVE SYSTEM
• Infections of the
digestive system
are caused by
bacteria, virus,
parasites like tape
worm, thread
worm, round
worm, hook
worm, pinworm
etc.
Bacteria
Tape worm
Virus
Pinworm
Thread worm
•83
•HSE Zoology blog
84. VOMITING
• It is the ejection of stomach
content through the mouth.
•84
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85. DIARRHOEA
• The abnormal
frequency of bowel
movement and
increased liquidity of
faecal discharge is
known as diarrhoea.
• It reduces the
absorption of food.
•85
•HSE Zoology blog
86. JAUNDICE
• The liver is affected, skin, eyes turn
yellow due to the deposition of bile
pigments.
•86
•HSE Zoology blog
87. CONSTIPATION
• The faeces are retained
with in the rectum as
the bowel movement
occur irregularly.
•87
•HSE Zoology blog
88. INDIGESTION
• The food is not properly
digested leading to the
feeling of fullness.
• The cause of indigestion
are inadequate enzyme
secretion, anxiety, food
poisoning, overeating
and spicy food.
•88
•HSE Zoology blog