Fetal membranes in chick
•
6 likes•3,719 views
The fetal membranes in chickens include the chorion, amnion, yolk sac, and allantois. These extraembryonic membranes develop from tissues outside the embryo to provide protection, nutrition, respiration, and excretion. The chorion surrounds the embryo and aids respiration and protection. The amnion encloses the embryo in amniotic fluid for shock absorption and prevents adhesion. The yolk sac absorbs nutrients from the yolk. The allantois aids excretion, respiration, and calcium absorption to help hatching. All membranes disappear by or during hatching.
Report
Share
Report
Share
Download to read offline
Recommended
extra embryonic membranes in birds
extra embryonic membranes in birds.
easy notes on it.
you can read and understand it easily.
this is in simple English language
Parental care in Amphibians
Parental care in amphibians provides benefits to offspring survival. There are various types of parental care exhibited by different amphibian species, including selecting protected nesting sites, defending eggs or territories, directly transporting tadpoles to water, gluing or carrying eggs attached to the body, and even viviparity in some species. Parental care improves offspring chances of survival by protecting eggs from predators and ensuring young amphibians safely reach water once hatched.
Development of chick
The document summarizes key stages in early chick development:
1) Fertilization occurs internally in the oviduct, followed by cleavage and the beginning of gastrulation even before egg laying.
2) Blastulation involves the formation of the blastoderm layers and subgerminal cavity.
3) Gastrulation continues after laying, forming the primitive streak which elongates toward the head region through cell migration.
4) Cells migrate through the streak to form the endoderm and mesoderm, and the ectoderm covers the embryo through epiboly. Axis specification establishes bilateral symmetry.
Types of egg, Classification of eggs, Structure of frog egg, Structure of chi...
The document discusses different types of eggs based on various classification schemes. Eggs can be classified based on the amount of yolk present as alecithal (no yolk), microlecithal (small amount of yolk), mesolecithal (moderate yolk), or macrolecithal/megalecithal (large amount of yolk). They can also be classified based on yolk distribution as isolecithal (uniform), telolecithal (concentrated at one pole), or centrolecithal (yolk at the center). Additionally, eggs are classified as mosaic (development predetermined) or regulative (development not predetermined), and as cleidoic (hard shell) or
Final chick embryonic-development-ppt
The document summarizes chicken embryonic development from fertilization through organogenesis. It discusses key stages including cleavage, blastulation, gastrulation forming the three germ layers, primitive streak formation, somite formation, neural tube formation, and organogenesis. Diagrams of chicken embryos at various developmental stages from 18 hours to 96 hours are included to illustrate structures as they develop.
Development of chick powerpoint
The egg of a chick is oval in shape, approximately 3cm wide and 5cm long. It has a porous shell made of calcium carbonate that allows for gas exchange. Inside are two types of membranes, the shell membrane and vitelline membrane, that separate to enclose an air space at the broad end. The egg undergoes fertilization internally in the upper part of the oviduct, where two polar bodies degenerate. Over 12-16 hours, the fertilized egg undergoes cleavage and then blastulation, forming three germ layers and extraembryonic structures through gastrulation and organogenesis.
vittelogenesis.pptx
Vittelogenesis is a word developed from Latin vitellus-yolk, and genero-produce
Vitellogenesis (also known as yolk deposition) is the process of yolk formation via nutrients being deposited in the oocyte, or female germ cell involved in reproduction of lecithotrophic organisms. In insects, it starts when the fat body stimulates the release of juvenile hormones and produces vitellogenin protein.
Yolks is the most usual form of food storage in the egg.
Yolks appear in the oocyte in the secondary period of their growth called vittelogenesis.
Thus,the formation and deposition of yolks is known as vittelogenesis
Characteristic
Yolks is a complex variable assembled component.
The principle component are protein,phospholipid and fats in different combination.
Depending upon these component yolks is distinguished into protein yolks and fatty acid
For eg- the avian contain 48.19% water , 16.6 % protein, 32.6% phospholipids and fats and 1% carbohydrates.
Structure and types of eggs
This document describes the structure and types of eggs. It discusses the structure of eggs including the plasma membrane, vitelline envelope, ooplasm, ectoplasm, endoplasm, nucleus and organelles. It then classifies eggs into four types based on amount of yolk, yolk distribution, development potency, and presence or absence of a shell. The main egg types include microlecithal, mesolecithal, macrolecithal eggs and mosaic vs. regulative development.
Recommended
extra embryonic membranes in birds
extra embryonic membranes in birds.
easy notes on it.
you can read and understand it easily.
this is in simple English language
Parental care in Amphibians
Parental care in amphibians provides benefits to offspring survival. There are various types of parental care exhibited by different amphibian species, including selecting protected nesting sites, defending eggs or territories, directly transporting tadpoles to water, gluing or carrying eggs attached to the body, and even viviparity in some species. Parental care improves offspring chances of survival by protecting eggs from predators and ensuring young amphibians safely reach water once hatched.
Development of chick
The document summarizes key stages in early chick development:
1) Fertilization occurs internally in the oviduct, followed by cleavage and the beginning of gastrulation even before egg laying.
2) Blastulation involves the formation of the blastoderm layers and subgerminal cavity.
3) Gastrulation continues after laying, forming the primitive streak which elongates toward the head region through cell migration.
4) Cells migrate through the streak to form the endoderm and mesoderm, and the ectoderm covers the embryo through epiboly. Axis specification establishes bilateral symmetry.
Types of egg, Classification of eggs, Structure of frog egg, Structure of chi...
The document discusses different types of eggs based on various classification schemes. Eggs can be classified based on the amount of yolk present as alecithal (no yolk), microlecithal (small amount of yolk), mesolecithal (moderate yolk), or macrolecithal/megalecithal (large amount of yolk). They can also be classified based on yolk distribution as isolecithal (uniform), telolecithal (concentrated at one pole), or centrolecithal (yolk at the center). Additionally, eggs are classified as mosaic (development predetermined) or regulative (development not predetermined), and as cleidoic (hard shell) or
Final chick embryonic-development-ppt
The document summarizes chicken embryonic development from fertilization through organogenesis. It discusses key stages including cleavage, blastulation, gastrulation forming the three germ layers, primitive streak formation, somite formation, neural tube formation, and organogenesis. Diagrams of chicken embryos at various developmental stages from 18 hours to 96 hours are included to illustrate structures as they develop.
Development of chick powerpoint
The egg of a chick is oval in shape, approximately 3cm wide and 5cm long. It has a porous shell made of calcium carbonate that allows for gas exchange. Inside are two types of membranes, the shell membrane and vitelline membrane, that separate to enclose an air space at the broad end. The egg undergoes fertilization internally in the upper part of the oviduct, where two polar bodies degenerate. Over 12-16 hours, the fertilized egg undergoes cleavage and then blastulation, forming three germ layers and extraembryonic structures through gastrulation and organogenesis.
vittelogenesis.pptx
Vittelogenesis is a word developed from Latin vitellus-yolk, and genero-produce
Vitellogenesis (also known as yolk deposition) is the process of yolk formation via nutrients being deposited in the oocyte, or female germ cell involved in reproduction of lecithotrophic organisms. In insects, it starts when the fat body stimulates the release of juvenile hormones and produces vitellogenin protein.
Yolks is the most usual form of food storage in the egg.
Yolks appear in the oocyte in the secondary period of their growth called vittelogenesis.
Thus,the formation and deposition of yolks is known as vittelogenesis
Characteristic
Yolks is a complex variable assembled component.
The principle component are protein,phospholipid and fats in different combination.
Depending upon these component yolks is distinguished into protein yolks and fatty acid
For eg- the avian contain 48.19% water , 16.6 % protein, 32.6% phospholipids and fats and 1% carbohydrates.
Structure and types of eggs
This document describes the structure and types of eggs. It discusses the structure of eggs including the plasma membrane, vitelline envelope, ooplasm, ectoplasm, endoplasm, nucleus and organelles. It then classifies eggs into four types based on amount of yolk, yolk distribution, development potency, and presence or absence of a shell. The main egg types include microlecithal, mesolecithal, macrolecithal eggs and mosaic vs. regulative development.
FATE Map
A chart showing the fate of each part of an early embryo, in a particular blastula stage is called fate maps. It is done because the correct interpretation of gastrulation is impossible without the knowledge of the position which are the presumptive germinal layers (Ectoderm, Mesoderm and Endoderm) occupy in blastula.
Fate mapping is a method used in developmental biology to study the embryonic origin of various adult tissues and structures. The "fate" of each cell or group of cells is mapped onto the embryo, showing which parts of the embryo will develop into which tissue. When carried out at single-cell resolution, this process is called cell lineage tracing. It is also used to trace the development of tumors.
Placentation in Mammals
In all viviparous animals, embryonic development takes place inside the uterus of the mother, because the eggs are microlecithal and the amount of stored yolk is not sufficient for the developing embryo. Such embryos get attached to the uterine wall to draw essential substances from the maternal circulation through the placenta.
Blastulation
The document summarizes the process of blastulation in embryonic development. It describes how the zygote undergoes cleavage, forming blastomeres that arrange into a structure called a morula. The morula then develops into the blastula stage, where the cells form a blastoderm layer surrounding an interior cavity called the blastocoel. There are different types of blastulae depending on features like whether the blastocoel is present, the number of cell layers in the blastoderm, and how yolk is distributed. Key blastula types include coeloblastula, stereoblastula, periblastula, discoblastula, and blastocyst.
Comparative Anatomy of Digestive System of Vertebrates
This document provides an overview of the comparative anatomy of the digestive system across different vertebrates. It describes the basic components and functions of the digestive tract, including the mouth, esophagus, stomach, intestines, and associated glands like the liver and pancreas. The key differences in digestive anatomy are often correlated with differences in diet, such as whether the food is readily absorbed or requires extensive breakdown, and whether the food supply is constant or scattered. Examples of digestive systems from various vertebrates like fish, frogs, reptiles, birds, and mammals are then described in more detail.
Cleavage, Types of cleavage
The document summarizes key aspects of cleavage in early embryonic development. It describes how cleavage involves repeated mitotic cell divisions following fertilization, resulting in blastomeres. Cleavage can be total or partial depending on how the cleavage furrows bisect the egg. There are also different cleavage planes and patterns (e.g. radial vs spiral cleavage) that influence cell positioning. Early blastomeres may be determinate, with fate predetermined, or indeterminate, retaining potential to develop into a complete embryo. Cleavages follow basic principles like Sachs' laws regarding equal cell division and perpendicular intersection of division planes.
Dentition in Mammals
DENTITION IN MAMMALS
The study of arrangement structure and number of types of teeth collectively is called as dentition. Teeth are present in the foetal as well as in adults of mammals, based on the presence of teeth Mammals are two types.
Edentata : In some animals teeth are absent hence called as edentate. e.g., Echidna or spiny ant-eater (Tachyglossus) the teeth are absent in all stages of life.
Dentata : Teeth are present in all mammals though a secon¬dary toothless condition is found in some mammals. Modern turtles and birds lack teeth. The adult platypus (Ornithorhynchus) bears epidermal teeth but no true teeth are present. In platypus embryonic teeth are replaced by horny epidermal teeth in adult.
Classification According to the Shape and Size of the Teeth:
Homodont:
Homodont or Isodont type of teeth is a condition where the teeth are all alike in their shape and size in the toothed whales e.g., Pinnipedians. Fishes, amphibians, reptiles and in the extinct toothed birds.
Heterodont
Heterodont condition is the usual feature in mammals, i.e. the teeth are distinguished according to their shape, size and function. The function is also different at different parts of the tooth row.
According to the Mode of Attachment of Teeth:
Thecodont : The teeth are lodged in bony sockets or alveoli of the jaw bone and capillaries and nerves enter the pulp cavity through the open tips of the hollow roots e.g., mammals, crocodiles and in some fishes.
Acrodont: The teeth are fused to the surface of the underlying jawbone. They have no roots and are attached to the edge of the jawbone by fibrous membrane e.g., fishes, amphibians and some reptiles.
Pleurodont:
The teeth are attached to the inner-side of the jawbone. The tooth touches the bone only with the outer surface of its root. In acrodont and pleurodont types of dentition, there are no roots, and nerves and blood vessels do not enter the pulp cavity at the base, e.g., Necturus (Amphibia) and some reptiles.
According to the Succession or Replace¬ment of Teeth:
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis, Significations of parthenogenesis
EARLY MAMMALIAN DEVELOPMENT
Mammalian development begins with fertilization inside the female's body. The zygote then undergoes cleavage divisions that are slower than in other animals. Around the 8-cell stage, the cells compact together and later form two distinct cell types - the inner cell mass and trophoblast cells. The trophoblast cells go on to form the blastocyst, with an inner cell mass surrounded by trophoblast cells. The blastocyst hatches from the zona pellucida and implants in the uterus, where the trophoblast cells invade the uterine tissue and the inner cell mass forms the embryo.
Types of eggs
This document describes different types of eggs based on their yolk content and distribution. It identifies four main categories of eggs: alecithal eggs which lack yolk; microlecithal, mesolecithal, and macrolecithal eggs which contain small, moderate, and large amounts of yolk respectively. It also describes four patterns of yolk distribution: homolecithal where yolk is uniform; telolecithal where yolk is concentrated on one side; centrolecithal where yolk is localized between two cytoplasm layers; and extremely telolecithal where nearly all the egg is yolk except a small disc of cytoplasm. Examples are provided for each category.
Development of frog up to formation of three germ layers, Blastula Stage, Gas...
Development of frog up to formation of three germ layers, Blastula Stage, Gastrula Stage, Archenteron formation
Regeneration, Types of Regeneration,Invertebrates&Vertebrates sp. ,Mechanism,...
Regeneration is the process by which organisms can regrow tissues or entire body parts, and occurs through the activity of stem cells. There are several types of regeneration including morphallaxis, epimorphosis, autonomy, and heteromorphosis. Regeneration ability varies greatly across different species of invertebrates and vertebrates, from simple organisms like hydra and planaria being able to regenerate entire bodies, to mammals only being able to regenerate certain tissues.
Gastrulation in Frog.pptx
Gastrulation is the process by which a single-layered blastula develops into a multi-layered structure called a gastrula through a series of cell movements. These movements include invagination of endoderm cells to form the inner layer, convergence and divergence of surface cells toward the blastopore, and involution of prechordal and mesoderm cells between the endoderm and ectoderm. By the end of gastrulation, the gastrula contains three germ layers - an outer ectoderm layer, an inner endoderm layer, and a middle mesoderm layer.
Pheromones bkk
This document discusses pheromones, which are chemicals secreted by organisms that trigger social responses in others of the same species. It defines pheromones and outlines their evolution from compounds with other uses to specialized signals. The document then describes several types of pheromones used for aggregation, alarm, reproduction, territory marking, and more. It also discusses the secretory organs that produce pheromones and their role in communication across the animal kingdom.
Fish Migration
Fish migration occurs for various reasons such as finding new habitats, feeding, reproduction, and escaping predators. There are several types of fish migration defined by distance, direction, and purpose. Anadromous fish migrate from salt water to fresh water to spawn, like salmon, while catadromous fish do the opposite, migrating from fresh to salt water to spawn. Potamodromous fish migrate within fresh water systems. Oceanodromous fish migrate long distances within salt water environments. Physical, chemical, and biological factors influence fish migration patterns. Migration allows fish to access new food sources and breeding habitats but also carries risks.
Social organization in honey bees
Honey bees are social insects, which means that they live together in large, well-organized family group.
Communication, complex net construction, environmental control, defense and divison of the labor are just some of the behaviour that honey bees have developed to exist successfully in social colonies.
A honey bees colony typically consists of three kinds of the bees 1) Queen. 2) Workers. 3) Drones.
In addition to thousands of workers adults, a colony normally has a single queen & several hundred drones.
Honey bees live in comb or nest.
Mutual cooperation exist.
Developed communication Dance.
Development of chick embryo- structure of egg,cleavages,fate map and primitiv...
The document describes the development of a chick embryo from fertilization through 48 hours of incubation. It discusses the cleavage of the egg, formation of the blastula and blastoderm, gastrulation including primitive streak formation, and the development of key structures like the neural tube, heart, somites, and circulatory system at 24 and 33 hours. The summary provides an overview of the key stages and structures developed during early chick embryo development.
Gastrulation in frog
Gastrulation is the process by which the three primary germ layers (endoderm, mesoderm, ectoderm) are formed in frog embryos through coordinated cell movements. In Xenopus embryos, gastrulation begins with bottle-shaped cells invaginating at the equatorial marginal zone to form the blastopore slit. These cells become the dorsal blastopore lip. Additional mesodermal and endodermal precursor cells involute through the expanding blastopore, eventually forming a ring around the yolky endoderm and completing germ layer formation. Fate mapping studies track the origins and locations of precursor cells during gastrulation.
Development of frog/ embryogenesis
1. The development of frog consists of copulation, spawning, fertilization, cleavage, blastulation, gastrulation, and post-embryonic development.
2. During gastrulation, epiboly, imboly, contraction of the blastopore, and involution occur, forming the three germ layers - ectoderm, mesoderm, and endoderm.
3. Post-embryonic development includes neurogenesis forming the neural tube, notogenesis forming the notochord, and coelom formation separating the mesoderm into three layers.
embryonic-induction.pdf
Embryonic induction describes the process by which one group of cells, or tissues, directs the development of another group of cells. Key experiments by Mangold and Spemann demonstrated regional specification during induction - tissues from different regions of the organizer induce different structures in the responding tissue. For example, the anterior portion of the archenteron roof induces head structures while the posterior portion induces tail structures. Spemann's experiments also showed that early amphibian blastomeres have an equal potency to form a complete embryo that is specified by cell-cell interactions, in particular by the gray crescent organizer tissue.
Extra embryonic membrane in chick, Types, Developments, Functions
The document discusses the four main types of extra-embryonic membranes that develop in birds during embryonic development - the yolk sac, amnion, chorion, and allantois. Each membrane has a distinct structure and function. The yolk sac surrounds and digests the yolk. The amnion forms a fluid-filled cavity that protects the embryo. The chorion forms the outermost layer where gas exchange occurs. The allantois acts as a respiratory organ and aids in waste removal. Together these membranes provide protection, nutrition, respiration and excretion to support the developing embryo.
Extra embryonic membranes
The document discusses the extraembryonic membranes that form during amniote development to allow for reproduction on land. It notes that in amniotes like reptiles, birds and mammals, the blastoderm gives rise not only to the embryo, but also to structures outside the embryo called extraembryonic membranes. These include the chorion, amnion, yolk sac and allantois. The yolk sac functions in nutrient absorption. The amnion encloses amniotic fluid. The allantois disposes of waste and contributes to gas exchange. These extraembryonic membranes allow for the development of terrestrial amniote embryos protected from desiccation.
More Related Content
What's hot
FATE Map
A chart showing the fate of each part of an early embryo, in a particular blastula stage is called fate maps. It is done because the correct interpretation of gastrulation is impossible without the knowledge of the position which are the presumptive germinal layers (Ectoderm, Mesoderm and Endoderm) occupy in blastula.
Fate mapping is a method used in developmental biology to study the embryonic origin of various adult tissues and structures. The "fate" of each cell or group of cells is mapped onto the embryo, showing which parts of the embryo will develop into which tissue. When carried out at single-cell resolution, this process is called cell lineage tracing. It is also used to trace the development of tumors.
Placentation in Mammals
In all viviparous animals, embryonic development takes place inside the uterus of the mother, because the eggs are microlecithal and the amount of stored yolk is not sufficient for the developing embryo. Such embryos get attached to the uterine wall to draw essential substances from the maternal circulation through the placenta.
Blastulation
The document summarizes the process of blastulation in embryonic development. It describes how the zygote undergoes cleavage, forming blastomeres that arrange into a structure called a morula. The morula then develops into the blastula stage, where the cells form a blastoderm layer surrounding an interior cavity called the blastocoel. There are different types of blastulae depending on features like whether the blastocoel is present, the number of cell layers in the blastoderm, and how yolk is distributed. Key blastula types include coeloblastula, stereoblastula, periblastula, discoblastula, and blastocyst.
Comparative Anatomy of Digestive System of Vertebrates
This document provides an overview of the comparative anatomy of the digestive system across different vertebrates. It describes the basic components and functions of the digestive tract, including the mouth, esophagus, stomach, intestines, and associated glands like the liver and pancreas. The key differences in digestive anatomy are often correlated with differences in diet, such as whether the food is readily absorbed or requires extensive breakdown, and whether the food supply is constant or scattered. Examples of digestive systems from various vertebrates like fish, frogs, reptiles, birds, and mammals are then described in more detail.
Cleavage, Types of cleavage
The document summarizes key aspects of cleavage in early embryonic development. It describes how cleavage involves repeated mitotic cell divisions following fertilization, resulting in blastomeres. Cleavage can be total or partial depending on how the cleavage furrows bisect the egg. There are also different cleavage planes and patterns (e.g. radial vs spiral cleavage) that influence cell positioning. Early blastomeres may be determinate, with fate predetermined, or indeterminate, retaining potential to develop into a complete embryo. Cleavages follow basic principles like Sachs' laws regarding equal cell division and perpendicular intersection of division planes.
Dentition in Mammals
DENTITION IN MAMMALS
The study of arrangement structure and number of types of teeth collectively is called as dentition. Teeth are present in the foetal as well as in adults of mammals, based on the presence of teeth Mammals are two types.
Edentata : In some animals teeth are absent hence called as edentate. e.g., Echidna or spiny ant-eater (Tachyglossus) the teeth are absent in all stages of life.
Dentata : Teeth are present in all mammals though a secon¬dary toothless condition is found in some mammals. Modern turtles and birds lack teeth. The adult platypus (Ornithorhynchus) bears epidermal teeth but no true teeth are present. In platypus embryonic teeth are replaced by horny epidermal teeth in adult.
Classification According to the Shape and Size of the Teeth:
Homodont:
Homodont or Isodont type of teeth is a condition where the teeth are all alike in their shape and size in the toothed whales e.g., Pinnipedians. Fishes, amphibians, reptiles and in the extinct toothed birds.
Heterodont
Heterodont condition is the usual feature in mammals, i.e. the teeth are distinguished according to their shape, size and function. The function is also different at different parts of the tooth row.
According to the Mode of Attachment of Teeth:
Thecodont : The teeth are lodged in bony sockets or alveoli of the jaw bone and capillaries and nerves enter the pulp cavity through the open tips of the hollow roots e.g., mammals, crocodiles and in some fishes.
Acrodont: The teeth are fused to the surface of the underlying jawbone. They have no roots and are attached to the edge of the jawbone by fibrous membrane e.g., fishes, amphibians and some reptiles.
Pleurodont:
The teeth are attached to the inner-side of the jawbone. The tooth touches the bone only with the outer surface of its root. In acrodont and pleurodont types of dentition, there are no roots, and nerves and blood vessels do not enter the pulp cavity at the base, e.g., Necturus (Amphibia) and some reptiles.
According to the Succession or Replace¬ment of Teeth:
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis, Significations of parthenogenesis
EARLY MAMMALIAN DEVELOPMENT
Mammalian development begins with fertilization inside the female's body. The zygote then undergoes cleavage divisions that are slower than in other animals. Around the 8-cell stage, the cells compact together and later form two distinct cell types - the inner cell mass and trophoblast cells. The trophoblast cells go on to form the blastocyst, with an inner cell mass surrounded by trophoblast cells. The blastocyst hatches from the zona pellucida and implants in the uterus, where the trophoblast cells invade the uterine tissue and the inner cell mass forms the embryo.
Types of eggs
This document describes different types of eggs based on their yolk content and distribution. It identifies four main categories of eggs: alecithal eggs which lack yolk; microlecithal, mesolecithal, and macrolecithal eggs which contain small, moderate, and large amounts of yolk respectively. It also describes four patterns of yolk distribution: homolecithal where yolk is uniform; telolecithal where yolk is concentrated on one side; centrolecithal where yolk is localized between two cytoplasm layers; and extremely telolecithal where nearly all the egg is yolk except a small disc of cytoplasm. Examples are provided for each category.
Development of frog up to formation of three germ layers, Blastula Stage, Gas...
Development of frog up to formation of three germ layers, Blastula Stage, Gastrula Stage, Archenteron formation
Regeneration, Types of Regeneration,Invertebrates&Vertebrates sp. ,Mechanism,...
Regeneration is the process by which organisms can regrow tissues or entire body parts, and occurs through the activity of stem cells. There are several types of regeneration including morphallaxis, epimorphosis, autonomy, and heteromorphosis. Regeneration ability varies greatly across different species of invertebrates and vertebrates, from simple organisms like hydra and planaria being able to regenerate entire bodies, to mammals only being able to regenerate certain tissues.
Gastrulation in Frog.pptx
Gastrulation is the process by which a single-layered blastula develops into a multi-layered structure called a gastrula through a series of cell movements. These movements include invagination of endoderm cells to form the inner layer, convergence and divergence of surface cells toward the blastopore, and involution of prechordal and mesoderm cells between the endoderm and ectoderm. By the end of gastrulation, the gastrula contains three germ layers - an outer ectoderm layer, an inner endoderm layer, and a middle mesoderm layer.
Pheromones bkk
This document discusses pheromones, which are chemicals secreted by organisms that trigger social responses in others of the same species. It defines pheromones and outlines their evolution from compounds with other uses to specialized signals. The document then describes several types of pheromones used for aggregation, alarm, reproduction, territory marking, and more. It also discusses the secretory organs that produce pheromones and their role in communication across the animal kingdom.
Fish Migration
Fish migration occurs for various reasons such as finding new habitats, feeding, reproduction, and escaping predators. There are several types of fish migration defined by distance, direction, and purpose. Anadromous fish migrate from salt water to fresh water to spawn, like salmon, while catadromous fish do the opposite, migrating from fresh to salt water to spawn. Potamodromous fish migrate within fresh water systems. Oceanodromous fish migrate long distances within salt water environments. Physical, chemical, and biological factors influence fish migration patterns. Migration allows fish to access new food sources and breeding habitats but also carries risks.
Social organization in honey bees
Honey bees are social insects, which means that they live together in large, well-organized family group.
Communication, complex net construction, environmental control, defense and divison of the labor are just some of the behaviour that honey bees have developed to exist successfully in social colonies.
A honey bees colony typically consists of three kinds of the bees 1) Queen. 2) Workers. 3) Drones.
In addition to thousands of workers adults, a colony normally has a single queen & several hundred drones.
Honey bees live in comb or nest.
Mutual cooperation exist.
Developed communication Dance.
Development of chick embryo- structure of egg,cleavages,fate map and primitiv...
The document describes the development of a chick embryo from fertilization through 48 hours of incubation. It discusses the cleavage of the egg, formation of the blastula and blastoderm, gastrulation including primitive streak formation, and the development of key structures like the neural tube, heart, somites, and circulatory system at 24 and 33 hours. The summary provides an overview of the key stages and structures developed during early chick embryo development.
Gastrulation in frog
Gastrulation is the process by which the three primary germ layers (endoderm, mesoderm, ectoderm) are formed in frog embryos through coordinated cell movements. In Xenopus embryos, gastrulation begins with bottle-shaped cells invaginating at the equatorial marginal zone to form the blastopore slit. These cells become the dorsal blastopore lip. Additional mesodermal and endodermal precursor cells involute through the expanding blastopore, eventually forming a ring around the yolky endoderm and completing germ layer formation. Fate mapping studies track the origins and locations of precursor cells during gastrulation.
Development of frog/ embryogenesis
1. The development of frog consists of copulation, spawning, fertilization, cleavage, blastulation, gastrulation, and post-embryonic development.
2. During gastrulation, epiboly, imboly, contraction of the blastopore, and involution occur, forming the three germ layers - ectoderm, mesoderm, and endoderm.
3. Post-embryonic development includes neurogenesis forming the neural tube, notogenesis forming the notochord, and coelom formation separating the mesoderm into three layers.
embryonic-induction.pdf
Embryonic induction describes the process by which one group of cells, or tissues, directs the development of another group of cells. Key experiments by Mangold and Spemann demonstrated regional specification during induction - tissues from different regions of the organizer induce different structures in the responding tissue. For example, the anterior portion of the archenteron roof induces head structures while the posterior portion induces tail structures. Spemann's experiments also showed that early amphibian blastomeres have an equal potency to form a complete embryo that is specified by cell-cell interactions, in particular by the gray crescent organizer tissue.
What's hot (20)
Comparative Anatomy of Digestive System of Vertebrates
Comparative Anatomy of Digestive System of Vertebrates
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis
Parthenogenesis, Natural parthenogenesis, Artificial parthenogenesis
Development of frog up to formation of three germ layers, Blastula Stage, Gas...
Development of frog up to formation of three germ layers, Blastula Stage, Gas...
Regeneration, Types of Regeneration,Invertebrates&Vertebrates sp. ,Mechanism,...
Regeneration, Types of Regeneration,Invertebrates&Vertebrates sp. ,Mechanism,...
Development of chick embryo- structure of egg,cleavages,fate map and primitiv...
Development of chick embryo- structure of egg,cleavages,fate map and primitiv...
Similar to Fetal membranes in chick
Extra embryonic membrane in chick, Types, Developments, Functions
The document discusses the four main types of extra-embryonic membranes that develop in birds during embryonic development - the yolk sac, amnion, chorion, and allantois. Each membrane has a distinct structure and function. The yolk sac surrounds and digests the yolk. The amnion forms a fluid-filled cavity that protects the embryo. The chorion forms the outermost layer where gas exchange occurs. The allantois acts as a respiratory organ and aids in waste removal. Together these membranes provide protection, nutrition, respiration and excretion to support the developing embryo.
Extra embryonic membranes
The document discusses the extraembryonic membranes that form during amniote development to allow for reproduction on land. It notes that in amniotes like reptiles, birds and mammals, the blastoderm gives rise not only to the embryo, but also to structures outside the embryo called extraembryonic membranes. These include the chorion, amnion, yolk sac and allantois. The yolk sac functions in nutrient absorption. The amnion encloses amniotic fluid. The allantois disposes of waste and contributes to gas exchange. These extraembryonic membranes allow for the development of terrestrial amniote embryos protected from desiccation.
Extra embryonic membrane
The amnion is the innermost membrane surrounding the amniotic cavity filled with fluid. It protects the embryo from drying out and shock. The chorion is the outermost membrane that forms the placenta connecting the mother and child. It has chorionic villi. The allantois and yolk sac are lower membranes that are part of the umbilical cord, with the allantois helping excretion and the yolk sac supplying nutrition to the embryo. The extra embryonic membranes form from the three germ layers, with the ectoderm forming the amnion, mesoderm forming somatic and splanchnic layers, and endoderm folding to form structures like the yolk sac and all
Extra embryonic structures
This document discusses extra embryonic structures in reptiles, birds, and mammals. It describes the development and functions of the yolk sac, amnion, chorion, and allantois in reptiles and birds. In mammals, the trophoblast cells form the chorion and placenta, while the inner cell mass develops into the embryo and associated structures like the yolk sac, amnion and allantois. The extra embryonic membranes support gas exchange, protect the embryo, and provide nutrients in different ways for reptiles, birds and mammals.
Explain how the three germ layers participate in the formation of ext.pdf
Explain how the three germ layers participate in the formation of extraembryonic membranes,
and discuss the importance of the placenta as an endocrine organ.
Solution
The three germ layers are not only responsible for the differentiation of specialized tissue rather
are also responsible for the formation of the extraembryonic membrane, that protects and
nourishes the embryo. The three extraembryonic membranes are formed from the primitive germ
layers:
The yolk sac is the membrane that forms from the endoderm and splanchnic mesoderm that
grows from the area opaca to form the sac. the yolk sac surrounds the yolk and draws the. the
endodermal gets more specialized and digest the yolk and pass its nutrients to the vitelline
circulation and thus to the membrane.
The amnion is formed from the ectoderm and somatic mesoderm that surrounds the embryo,
forming a protective cover for the embryo. the inner layer of the main secretes amniotic fluid in
which the embryo floats and prevents it from drying.
The chorion-allantoic membrane in which the chorion is made from the ectoderm and somatic
mesoderm while the allantoic membrane is formed from the endoderm and splanchnic
mesoderm. the allantoic membrane works with the chorion to exchange gasses between the
embryo and the outside environment. The allantois also stores the wastes of the embryo.
The placenta is considered as an endocrine gland present temporarily during pregnancy. the
placenta is responsible for the production of hormones that are responsible for the healthy
pregnancy. It secretes placental lactogen, placental growth relaxin as these hormones are
important for the healthy propagation of the pregnancy..
Implantation, Embryonic membrane and Twinning
The document summarizes embryonic membrane development in birds, reptiles, and mammals. It discusses the formation and functions of the amnion, chorion, yolk sac, and allantois membranes. It also describes how mammals are divided based on their embryonic development methods into prototheria, metatheria, and eutheria. The types of placentas and twins are summarized, including dizygotic, monozygotic, conjoined, and parasitic twins.
Embryology{extra embryonic membrane}(1)
This document discusses the four main types of extraembryonic membranes in reptiles, birds, and mammals. It provides details on the yolk sac, amnion, allantois, and chorion. For each membrane, it describes its embryonic origin, function in nutrient/waste exchange or protection of the embryo, and presence/absence in different vertebrate groups including humans. The topic was submitted as part of a school project on extraembryonic membranes by a student in their second year of studying zoology.
Extra embryonic membranes amniotes
The document discusses the four extraembryonic membranes - the amnion, chorion, allantois, and yolk sac - that form in amniote embryos like reptiles, birds and mammals. These membranes allow the embryo to develop on land by mediating gas exchange, waste disposal, nutrition and preventing desiccation. Specifically, the amnion contains fluid to prevent drying out, the chorion facilitates gas exchange, the allantois stores waste, and the yolk sac provides nutrition from the yolk in early development. Together, these extraembryonic membranes enable amniote vertebrates to reproduce via shelled eggs laid on land.
Implantation and placentation , and overview
Implantation and formation of placenta is an essential developmental process during human embryogenesis as it marks the connection between maternal and fetal blood, a condition specific to mammals more precisely eutherians. It works as a passage of required nutrients to the growing embryo and collection of its waste. It also discusses various types of placenta that are seen in mammals.
Extra Embryonic Membranes Of Chick
1. DEFINITION
These are the membranes which do not form any part of
the embryo proper but performs various functions which
assist in the development of the embryo . These are
discarded at the time of hatching. These membranes
formed outside the embryo.
2. Types of Extra Embryonic Membranes
Yolk Sac
Amnion
Chorion
Allantois
3.Discussed Their
At Time of ORIGIN
It's FUNCTION
After HATCHING
4. AMNIOTIC CAVITY
............................END......................................................
Embryology of face
The document discusses the embryology of the face, beginning with formation of the three germ layers - ectoderm, endoderm, and mesoderm. It describes how the pharyngeal arches and pouches form and their derivatives. Facial development involves outgrowths from the frontonasal process and mandibular arches. Nasal placodes form and sink to become nasal pits. The mandibular processes fuse to form the lower lip and jaw, while maxillary processes fuse with other structures to form the upper lip.
Extick anra Embryonic membrane in Chd Placenta in Mammals
Introduction:
1.Membranes laying around the embryo are called extraembryonic membranes.
They are also called foetal membranes.
They are tissues produced by an animal embryo for protection, respiration, nutrition and excretion in chick.
They are produced from peripheral part of blastoderm called area opeca.
Fetal mem&twin
The document discusses fetal membranes and twin pregnancies. It describes the development and functions of the major fetal membranes - the amnion, chorion, yolk sac, allantois, and umbilical cord.
The amnion forms a fluid-filled sac that surrounds and protects the embryo. The chorion forms the outer wall of the chorionic sac and supports the growth of chorionic villi which facilitate nutrient exchange. The yolk sac provides early nutrition and plays a role in blood cell and germ cell formation. The allantois contributes to the development of the umbilical vessels. The umbilical cord develops from the connecting stalk and transports nutrients and waste between the fetus and placent
The foetal membranes
The document discusses the fetal membranes, which include the chorion and amnion. The chorion is the outer membrane that is attached to the placenta and uterine wall. The amnion lines the chorion and encloses the fetus and amniotic fluid. The amniotic fluid provides protection and nutrition for the fetus, and aids in temperature regulation and movement. It is composed primarily of water, carbohydrates, proteins and minerals. The amniotic fluid circulates continuously, with production from the fetal membranes, fetal urine and transudation from maternal and fetal blood.
Extraembryonic structures in reptiles and birds
The document summarizes the development of extraembryonic structures in reptiles and birds. It describes how in these species, the blastodisc spreads over the yolk sac, differentiating into three germ layers. Blood islands form and differentiate into blood vessels and blood cells. Four extraembryonic membranes develop - the yolk sac for nutrient absorption, amnion which encloses the embryo, chorion which forms the outer layer of protection, and the allantois which acts as the respiratory organ and exchanges gases.
Human reproduction-III
The topic discussed here is the Process of fertilization, different stages of fertilization, Implantation, Gastrulation, Formation of foetal membranes, Development of Embryo, Labor & Parturition
Gametogenesis
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.
Fertilisation
Fertilization occurs when an ovum and sperm unite in the fallopian tube. The fertilized egg then undergoes cell division as it travels to the uterus, developing from a morula to a blastocyst. The blastocyst implants in the uterine wall and the placenta begins to form, allowing nutrients to pass from mother to fetus. The placenta, umbilical cord, and amniotic fluid all work to support fetal development in the womb.
Embryology part 2
1. The document provides an overview of key topics in general embryology, including fertilization and cleavage, formation of the blastocyst and bilaminar germ disc, implantation and early placentation, and gastrulation.
2. During the second week, the trophoblast differentiates into the cytotrophoblast and syncytiotrophoblast layers. The embryoblast also differentiates into the epiblast and hypoblast layers, forming the bilaminar germ disc. The extraembryonic mesoderm divides into the somatopleuric and splanchnopleuric layers.
3. In the third week, gastrulation occurs as migrating epiblast cells form
Obg ppt
The document summarizes the key stages of fertilization and embryonic development in humans. It describes:
1) Fertilization occurring when the sperm fuses with the ovum in the fallopian tube to form a zygote, which undergoes cell division over several days to become a morula and then a blastocyst.
2) The blastocyst implants in the uterine wall and the trophoblast develops to form the placenta, while the inner cell mass forms the embryo and its structures.
3) It outlines the major developmental milestones from weeks 3-31, including organ formation, growth of limbs and senses, and increasing activity of the fetus.
Similar to Fetal membranes in chick (20)
Extra embryonic membrane in chick, Types, Developments, Functions
Extra embryonic membrane in chick, Types, Developments, Functions
Explain how the three germ layers participate in the formation of ext.pdf
Explain how the three germ layers participate in the formation of ext.pdf
Extick anra Embryonic membrane in Chd Placenta in Mammals
Extick anra Embryonic membrane in Chd Placenta in Mammals
More from Sandip Rathod
Physico-Chemical characteristic of fresh water.pptx
This document discusses the physical, chemical, and biological properties of fresh water. It describes key characteristics like pH, electrical conductivity, total dissolved solids, dissolved oxygen, free carbon dioxide, alkalinity, hardness, chlorides, sulfates, hydrogen sulfide, calcium, magnesium, sodium, potassium, and iron. The physical properties covered include color, odor, taste, temperature, and transparency. The biological properties briefly mention macrophytes, phytoplankton, zooplankton, and saprophytes. Overall, the document provides a comprehensive overview of the various psycho-chemical characteristics that define the quality and composition of fresh water.
Mutation Theory of De Vries.pdf
Hugo De Vries proposed the mutation theory of evolution in 1901. He observed mutations in the evening primrose plant Oenothera lamarkiana over 8 years, finding 837 new varieties that bred true. De Vries classified these new varieties into progressive, retrogressive, degressive, and inconstant species based on changes to characteristics. De Vries' observation of sudden variations in plants formed the basis of his mutation theory of evolution.
Hardy-Weinberg Law.pdf
The Hardy-Weinberg law states that gene frequencies in a population will remain constant from generation to generation if the population is large, randomly mating, and experiences no evolutionary influences like mutation, migration, or natural selection. The law can be represented through a simple formula and is used to calculate the expected frequencies of genotypes in a population based on the gene frequencies. It provides a foundation for studying population genetics and evolution through a mathematical approach.
Embryological Evidences.pdf
The document discusses several concepts in embryology including:
1. All animals develop from a single egg cell and pass through similar developmental stages.
2. The gastrula of all animals has three germ layers - ectoderm, mesoderm, and endoderm - that develop into different tissues and organ systems.
3. According to Von Baer's law and the biogenetic law, higher animal embryos pass through stages resembling the adult forms of lower animals from which they evolved.
Types of egg
There are three main ways to classify types of eggs: by amount of yolk, distribution of yolk, and presence of a shell. In terms of yolk amount, eggs can be alecithal (negligible yolk), microlecithal (small yolk), mesolecithal (moderate yolk), or polylecithal (large yolk). Distribution of yolk determines if an egg is isollecithal (evenly distributed), telolecithal (yolk on one pole), or centrolecithal (yolk in center). Finally, eggs can have a hard shell (cleidoic) like reptiles and birds or lack a shell (non-cleido
Lamarckism
1) Lamarckism is a theory of organic evolution that proposes that complex organisms evolved from simpler organisms, and that characteristics acquired over the lifetime of organisms can be inherited by offspring.
2) According to Lamarckism, changes in the environment create new needs for organisms, which then develop new structures in response through the use and disuse of organs. Continuous use strengthens and develops organs over time, while disuse weakens and deteriorates them.
3) Lamarck proposed that acquired characteristics, such as a giraffe's long neck developed from stretching to reach leaves, could be passed on to offspring through inheritance.
More from Sandip Rathod (6)
Physico-Chemical characteristic of fresh water.pptx
Physico-Chemical characteristic of fresh water.pptx
Recently uploaded
Authoring a personal GPT for your research and practice: How we created the Q...
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.
Micronuclei test.M.sc.zoology.fisheries.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
The binding of cosmological structures by massless topological defects
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.
Immersive Learning That Works: Research Grounding and Paths Forward
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.8.Isolation of pure cultures and preservation of cultures.pdf
Isolation of pure culture, its various method.
The cost of acquiring information by natural selection
This is a short talk that I gave at the Banff International Research Station workshop on Modeling and Theory in Population Biology. The idea is to try to understand how the burden of natural selection relates to the amount of information that selection puts into the genome.
It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
Direct Seeded Rice - Climate Smart Agriculture
Direct Seeded Rice - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...Scintica Instrumentation
Targeting Hsp90 and its pathogen Orthologs with Tethered Inhibitors as a Diagnostic and Therapeutic Strategy for cancer and infectious diseases with Dr. Timothy Haystead.ESR spectroscopy in liquid food and beverages.pptx
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
学校原件一模一样【微信：741003700 】《(salfor毕业证书)索尔福德大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Pests of Storage_Identification_Dr.UPR.pdf
InIndia-post-harvestlosses-unscientificstorage,insects,rodents,micro-organismsetc.,accountforabout10percentoftotalfoodgrains
Graininfestation
Directdamage
Indirectly
•theexuviae,skin,deadinsects
•theirexcretawhichmakefoodunfitforhumanconsumption
About600speciesofinsectshavebeenassociatedwithstoredgrainproducts
100speciesofinsectpestsofstoredproductscauseeconomiclosses
Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
Recently uploaded (20)
GBSN - Biochemistry (Unit 6) Chemistry of Proteins
GBSN - Biochemistry (Unit 6) Chemistry of Proteins
Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
Immersive Learning That Works: Research Grounding and Paths Forward
Immersive Learning That Works: Research Grounding and Paths Forward
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
The cost of acquiring information by natural selection
The cost of acquiring information by natural selection
Juaristi, Jon. - El canon espanol. El legado de la cultura española a la civi...
Juaristi, Jon. - El canon espanol. El legado de la cultura española a la civi...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
Fetal membranes in chick
- 1. Fetal Membranes in Chick SANDIP RATHOD
- 2. The Embryos are covered and protected by a set of membranes called foetal membranes. These membranes are developed from the tissue lying outside the embryo, Hence they are also called extra-embryonic membranes. The main function of the foetal membranes are to provided protection, nutrition respiration and excretion to the embryo. All the foetal membranes disappear before or immediately after hatching There are mainly four types foetal membranes such as 1. Chorion 2. Amnion 3. Yolk Sac 4. Allantois
- 4. 1. Chorion
- 5. Chorion is a foetal membrane or extraembryonic membrane. It is also called serosa It surrounds the entire embryo and lies our side. It lies close to the shell It is made up of two layers, namely an outer ectoderm and inner somatic mesoderm. The cavity enclosed by the chorion is called extra- embryonic coelom The chorion develops from somatopleure containing an outer ectoderm and inner somatic mesoderm. Chorion ruptures at the time of hatching. Chorion does two functions, namely respiration and protection.
- 6. 2. Amnion
- 7. Amnion is a foetal membrane or extra- embryonic membrane. The animals developing an amnion are called amniota. Eg.Reptiles, birds and mammals. The animals which do not develop an amnion are called anamniote eg. Fishes, amphibians etc. It surrounds the embryo. It is made up of two layers, namely an outer somatic mesoderm and inner ectoderm. It encloses a cavity called amniotic cavity. It is filled with a fluid called amniotic fluid. The amnion is connected to the embryo on the ventral side by a stalk called somatic umbilicus. Amnion develops from somatopleure. During development the somatopleure develops certain folding called amniotic folds. The amniotic folds develop in to amnion.
- 8. Amnion functions: 1. The amniotic fluid provides a liquid medium for the embryo. It is called artificial swimming pool of the embryo. 2. The amniotic fluid functions as a shock absorber. 3. It prevents the adhesion of the embryo to the shell. 4. It helps in respiration.
- 9. 3. Yolk Sac
- 10. Yolk sac is a foetal membrane or extraembryonic membrane. Yolk sac encloses the yolk. It is made up of an inner endoderm and outer splanchnic mesoderm. It develops from splanchnopleure. It is attached to the midgut by a narrow stalk called yolk stalk. It opens into the midgut by a yolk duct. The endoderm of yolk sac has mainly finger-like folds called yolk sac septa. The yolk sac septa increase the area of absorption of yolk. The yolk sac is supplied by a pair of vitelline arteries. A pair of vitelline veins collected the blood from the yolk sac. The yolk sac gradually decrease in size as the yolk consumed. The yolk sac provides nutrition for the embryo.
- 11. 4. Allantois
- 12. Allantois is a foetal membrane or extra embryonic membrane. It is made up of an inner endoderm and outer splanchnic mesoderm. It is develops from splanchnopleure. It is attached to the hindgut by a narrow stalk called allantoic stalk. Allantois is supplied by a pair of allantoic arteries and a single allantoic vein. As development advances, allantois increase In volume. In later stage, splanchnic mesoderm of allantois and somatic mesoderm of chorion fuse together to from a chorioallantoic membrane. Allantois raptures at the time of hatching.
- 13. Function: 1. It is excretory in function. It collects the excretory products from the embryo. 2. It helps in respiration. 3. It absorbs calcium from the shell. This helps the rupture of the shell at the time of hatching.