Here are the key structures to locate in the thoracic cavity:
1. Locate the heart. The heart is located in the thoracic cavity, surrounded by the pericardial sac. It is a muscular organ that pumps blood throughout the body via arteries and veins.
2. Locate the lungs. The lungs occupy most of the posterior thoracic cavity. They are soft, pinkish-gray organs responsible for gas exchange between inhaled air and blood.
3. Locate the trachea. As reviewed earlier, the trachea is a cartilaginous tube that carries air from the mouth and nose into the lungs. It branches into the two mainstem bronchi that enter each lung.
4
Biology A Laboratory Guide the Natural world bacterial infection. The.pdfhardjasonoco14599
Biology A Laboratory Guide the Natural world bacterial infection. The thymus gland is where T
cels (mmune system cells) mature, especial 1. Which hallmark chordate characteristic( ly in
younger animals and secretes hormones the immune response. The do you see in the rat? is
bilobed and located on both sides cf the neck post anal tal nerve Drsal no (Figure 5) Behind the
glands and muscles you will tind the trachea, or windpipe. The trachea is lined with rings of
cartilage. The rings of keep the trachea from as a food Chord passes down the esophagus that lies
dorsal to the trachea. 2. Which of these are not found in adult hu- VISCERA OF THE THORAX
mans? have 5. Folow the trachea to where it branches into the two bronchi, one leading to each
lung. Look at the poston of the lungs in the body cavity. Notice by a thin layer of tis- that the
heart is Cectan), and humans have sue cated the pericardium. Remove the per- cardium, and
identify the atria and ventricles. continue the dissection 6. If your instructor wants to next week,
close the body cavites of your rat and place the animal in a plastic bag Seal the bag and label it
with your intals and lab period, so that you can easily find it next time (Proceed with Where are
the rat\'s sensory structures locat- Step 7 before you leave class. ed? What fundamental
eolutionary tion does this illustrate 7, when your gloves are off and your lab bench is to listen to
your part. clean, use a stethoscope i far, Paw, and ner\'s breathing sounds. As the diaphragm con
tracts, the lungs expand and air moves into them. Listen to each lobe of your partner\'s lungs. 4
Why is it an advantage for the epiglottis to fit over the trachea? FoURE 5 Neck Viscera
Solution
3. Where are the rat’s sensory structures located? What fundamental evolutionary innovation
does this illustrates?
Answer:
The rat’s sensory structures are located between the ribs and the top of the hips. Examples of
these are feet, eyes, nose/ whiskers, and ears. Like humans,the rats are vertebrate mammals. In
many aspects of its structural organization are common with humans. Thus, they have many
similarities and these similarities of structures among related organisms shows evidence of
common ancestry..
The document provides background information on frog anatomy. It describes the external features of the frog's head such as its nostrils, eardrums, eyes, and mouth interior. It then details the major internal organ systems, including the respiratory, circulatory, digestive, urinary, and reproductive systems. The summary concludes by outlining the objectives and materials for a frog dissection lab, intended to observe and identify the external and internal structures of the frog.
This document provides instructions for exercises examining the morphology of insects including cockroaches, mosquitoes, sandflies, biting midges, and blackflies. It describes the procedures for examining both external and internal anatomy of these insects as well as their immature stages. Key structures are defined for each insect group, such as the segmented body, antennae, wings, legs, mouthparts, circulatory and digestive systems. The exercises aim to teach insect morphology and aid in identification of specimens.
This document provides instructions for a frog dissection lab. It begins with terminology and safety instructions. Students are tasked with labeling the external anatomy of a frog, including identifying structures like the dorsal and ventral surfaces, limbs, eyes, tympanic membranes, and mouthparts. The internal dissection involves pinning and making cuts to expose organs. Key systems that are dissected and labeled include the digestive system (stomach, intestines, liver), urogenital system (kidneys, testes/ovaries), respiratory system (lungs), and circulatory system (heart). Questions assess understanding of anatomy like frog sex determination and organ descriptions. A list of terms to know for an exam is also provided.
This document summarizes a lab where a student dissected and compared the organ systems of a frog and fetal pig to those of humans. The student found that while frogs and pigs shared some organ similarities, such as liver structure, they also had differences. Notably, the frog's intestines were shorter than the pig's, and the pig had an umbilical cord while the frog did not. Through the dissection, the student learned about key organs like the heart, lungs, stomach and intestines in these species and how they function in digestion and circulation.
This marine science lab document provides instructions for students to dissect a crayfish in order to study its external and internal anatomy and identify the major organs that make up its digestive, respiratory, circulatory, nervous, excretory and reproductive systems. Students are guided to locate structures like the carapace, rostrum, antennae, mandibles, maxillae, maxillipeds, chelipeds, walking legs, swimmerets, uropods, telson, stomach, digestive gland, intestine, gills, heart, nerve cord, ganglia, brain, green glands, testis or ovary through detailed diagrams and step-
This document provides instructions and background information for a frog dissection lab. Students are asked to identify terms related to frog anatomy, observe both external and internal frog structures, determine the frog's sex, and note the organ systems and functions of what they observe. Guidelines emphasize careful dissection techniques and safety procedures.
The document summarizes the steps of a frog dissection lab, where students examine the external and internal anatomy of a frog. Students observe the frog's dorsal and ventral sides, measure various parts, and locate structures like the eyes, tympanic membranes, and mouthparts. Upon cutting open the frog, they identify internal organs like the liver, heart, lungs, stomach, intestines, kidneys and reproductive structures. The purpose is to learn frog anatomy through hands-on examination and labelling of both external and internal features.
Biology A Laboratory Guide the Natural world bacterial infection. The.pdfhardjasonoco14599
Biology A Laboratory Guide the Natural world bacterial infection. The thymus gland is where T
cels (mmune system cells) mature, especial 1. Which hallmark chordate characteristic( ly in
younger animals and secretes hormones the immune response. The do you see in the rat? is
bilobed and located on both sides cf the neck post anal tal nerve Drsal no (Figure 5) Behind the
glands and muscles you will tind the trachea, or windpipe. The trachea is lined with rings of
cartilage. The rings of keep the trachea from as a food Chord passes down the esophagus that lies
dorsal to the trachea. 2. Which of these are not found in adult hu- VISCERA OF THE THORAX
mans? have 5. Folow the trachea to where it branches into the two bronchi, one leading to each
lung. Look at the poston of the lungs in the body cavity. Notice by a thin layer of tis- that the
heart is Cectan), and humans have sue cated the pericardium. Remove the per- cardium, and
identify the atria and ventricles. continue the dissection 6. If your instructor wants to next week,
close the body cavites of your rat and place the animal in a plastic bag Seal the bag and label it
with your intals and lab period, so that you can easily find it next time (Proceed with Where are
the rat\'s sensory structures locat- Step 7 before you leave class. ed? What fundamental
eolutionary tion does this illustrate 7, when your gloves are off and your lab bench is to listen to
your part. clean, use a stethoscope i far, Paw, and ner\'s breathing sounds. As the diaphragm con
tracts, the lungs expand and air moves into them. Listen to each lobe of your partner\'s lungs. 4
Why is it an advantage for the epiglottis to fit over the trachea? FoURE 5 Neck Viscera
Solution
3. Where are the rat’s sensory structures located? What fundamental evolutionary innovation
does this illustrates?
Answer:
The rat’s sensory structures are located between the ribs and the top of the hips. Examples of
these are feet, eyes, nose/ whiskers, and ears. Like humans,the rats are vertebrate mammals. In
many aspects of its structural organization are common with humans. Thus, they have many
similarities and these similarities of structures among related organisms shows evidence of
common ancestry..
The document provides background information on frog anatomy. It describes the external features of the frog's head such as its nostrils, eardrums, eyes, and mouth interior. It then details the major internal organ systems, including the respiratory, circulatory, digestive, urinary, and reproductive systems. The summary concludes by outlining the objectives and materials for a frog dissection lab, intended to observe and identify the external and internal structures of the frog.
This document provides instructions for exercises examining the morphology of insects including cockroaches, mosquitoes, sandflies, biting midges, and blackflies. It describes the procedures for examining both external and internal anatomy of these insects as well as their immature stages. Key structures are defined for each insect group, such as the segmented body, antennae, wings, legs, mouthparts, circulatory and digestive systems. The exercises aim to teach insect morphology and aid in identification of specimens.
This document provides instructions for a frog dissection lab. It begins with terminology and safety instructions. Students are tasked with labeling the external anatomy of a frog, including identifying structures like the dorsal and ventral surfaces, limbs, eyes, tympanic membranes, and mouthparts. The internal dissection involves pinning and making cuts to expose organs. Key systems that are dissected and labeled include the digestive system (stomach, intestines, liver), urogenital system (kidneys, testes/ovaries), respiratory system (lungs), and circulatory system (heart). Questions assess understanding of anatomy like frog sex determination and organ descriptions. A list of terms to know for an exam is also provided.
This document summarizes a lab where a student dissected and compared the organ systems of a frog and fetal pig to those of humans. The student found that while frogs and pigs shared some organ similarities, such as liver structure, they also had differences. Notably, the frog's intestines were shorter than the pig's, and the pig had an umbilical cord while the frog did not. Through the dissection, the student learned about key organs like the heart, lungs, stomach and intestines in these species and how they function in digestion and circulation.
This marine science lab document provides instructions for students to dissect a crayfish in order to study its external and internal anatomy and identify the major organs that make up its digestive, respiratory, circulatory, nervous, excretory and reproductive systems. Students are guided to locate structures like the carapace, rostrum, antennae, mandibles, maxillae, maxillipeds, chelipeds, walking legs, swimmerets, uropods, telson, stomach, digestive gland, intestine, gills, heart, nerve cord, ganglia, brain, green glands, testis or ovary through detailed diagrams and step-
This document provides instructions and background information for a frog dissection lab. Students are asked to identify terms related to frog anatomy, observe both external and internal frog structures, determine the frog's sex, and note the organ systems and functions of what they observe. Guidelines emphasize careful dissection techniques and safety procedures.
The document summarizes the steps of a frog dissection lab, where students examine the external and internal anatomy of a frog. Students observe the frog's dorsal and ventral sides, measure various parts, and locate structures like the eyes, tympanic membranes, and mouthparts. Upon cutting open the frog, they identify internal organs like the liver, heart, lungs, stomach, intestines, kidneys and reproductive structures. The purpose is to learn frog anatomy through hands-on examination and labelling of both external and internal features.
Crash-Course for AIPMT & Other Medical Exams 2016 (Essentials cockroach)APEX INSTITUTE
Dear Students/Parents
We at 'Apex Institute' are committed to provide our students best quality education with ethics. Moving in this direction, we have decided that unlike other expensive and 5star facility type institutes who are huge investors and advertisers, we shall not invest huge amount of money in advertisements. It shall rather be invested on the betterment, enhancement of quality and resources at our center.
We are just looking forward to have 'word-of-mouth' publicity instead. Because, there is only a satisfied student and his/her parents can judge an institute's quality and it's faculty members coaching.
Those coaching institutes, who are investing highly on advertisements, are actually, wasting their money on it, in a sense. Rather, the money should be invested on highly experienced faculty members and on teaching gears.
We all at 'Apex' are taking this initiative to improve the quality of education along-with each student's development and growth.
Committed to excellence...
With best wishes.
S . Iqbal
( Motivator & Mentor)
The document provides background information and procedures for dissecting an earthworm to observe its external and internal structures. It begins with the scientific classification of Lumbricus terrestris (night crawler or dew worm). The objectives are to describe organs and name systems. Materials for dissection are listed. The background discusses earthworm anatomy including segments, clitellum, circulatory and digestive systems, nervous system, excretory organs, and respiration through the skin. The procedure guides observation of external features and internal dissection to locate specific organs like the hearts, blood vessels, pharynx, crop, gizzard, intestine, nerve cord, ganglia, nephridia, ovaries, and testes.
This document provides instructions and background information for dissecting a frog. It outlines the materials needed and guides the reader through examining the frog's external anatomy, internal mouth, and conducting the dissection. The dissection procedure involves making cuts to expose the internal organs, removing organs like the liver and digestive tract, and opening the cranium to view the brain. A worksheet is included to have students record their observations at different steps.
This document provides instructions and diagrams for dissecting a grasshopper. It describes the external and internal anatomy of grasshoppers, identifying structures like the compound eyes, antennae, mouthparts, legs, spiracles, and reproductive and digestive organs. The dissection process involves removing the exoskeleton and cutting along the abdomen to expose the internal organs.
The document provides instructions and background information for dissecting an earthworm to observe its external and internal structures. Key organs and systems that will be examined include the circulatory system with five pairs of hearts, the digestive system containing a pharynx, esophagus, crop, gizzard and intestine, the nervous system with a ventral nerve cord and ganglia, the excretory nephridia, and reproductive organs like ovaries, testes, sperm grooves and genital pores. The purpose is to describe the appearance of various organs and name the parts of different systems like circulatory, digestive and nervous.
The document provides instructions for dissecting a frog. It begins by describing how to determine the frog's sex by examining its forelegs. The external anatomy is then explored, labeling structures like the eyes, eardrums, nostrils, and skin coloration. Next, the internal mouth structures are located and labeled, including the tongue, teeth, and openings. The digestive, circulatory and respiratory systems are then dissected and their main organs and structures are identified and labeled in diagrams, such as the liver, stomach, intestines, lungs and heart. Finally, the urinary and reproductive systems are briefly described.
This document provides information on the external and internal anatomy of the American cockroach (Periplaneta americana). Externally, it has a flattened body with a hardened exoskeleton, compound eyes, antennae, wings, and three pairs of legs. Internally, it has open circulatory and respiratory systems that allow for gas exchange through tracheae and spiracles. The nervous system consists of a brain, ventral nerve cord, and ganglia. The digestive system includes a foregut, midgut, and hindgut for ingestion and breakdown of food. Reproduction is dioecious with separate male and female sexes.
This document provides instructions for a regional dissection of the back, shoulder, and spinal cord regions of the human body as part of a medical gross anatomy course. It outlines the goals and steps for dissecting the muscles, nerves, vessels, bones and joints in these areas over several class periods. The dissection is designed to teach students the anatomical structures and their relationships through direct observation and manipulation of a cadaver.
This lesson plan introduces students to the nervous systems and sensory organs of different animal phyla. It begins with an overview of the human nervous system and a discussion of senses. Students then observe models of representative species from different phyla to learn about their sensory abilities, how sensory information is processed, and how they respond to stimuli. The lesson focuses on 9 animal phyla in particular, starting with Chordata which includes mammals like rats, dogs, and horses. The summary recaps what was learned about chordate nervous systems and previews that the next part will cover the remaining phyla.
This document discusses the anatomy and structures of the insect head and appendages. It begins by describing how the insect body is segmented and then grouped into three main tagmata: the head, thorax, and abdomen. It then focuses on the structures and segmentation of the insect head, including the sclerites, sutures, mouthparts, and types of heads based on mouthpart positioning. The document also discusses the antennae and its various modifications, as well as the structures and modifications of the legs between different insect orders.
The document discusses different types of zooids found in polyps and medusae, including gastrozooids, dactylozooids, gonozooids, pneumatophores, nectocalyces, bracts, and gonophores. It also describes pseudo-metamerism and metamerism, and the differences between complete and incomplete metamerism. Theria and Prototheria are defined, with their distinguishing characteristics listed. Theria include mammals that give birth to live young and have mammary glands, while Prototheria lay eggs and have mammary glands without teats. Examples of each group are given.
The document provides instructions for dissecting a frog to observe and identify its external and internal structures and organs. Key steps include: pinning down the frog and making cuts to open the body cavity; locating organs like the heart, lungs, digestive organs in the stomach, intestines, liver and gallbladder; and identifying circulatory and respiratory systems before disposal of materials and cleanup. The purpose is to describe and name the organs that make up the frog's various body systems through hands-on dissection.
Unit-1 Master of forestry(Entomology) final.pptxhimkantipoudel
This document provides an overview of insect morphology and physiology. It begins by defining entomology and forest entomology, and describing the scope of forest entomology. It then discusses the external morphology of insects, including their body surface, segmentation, head, thorax, abdomen and appendages. The document also describes the internal systems of insects, focusing on the digestive system including the foregut, midgut and hindgut, as well as the respiratory system consisting of trachea and spiracles, and the nervous system composed of a nerve cord and ganglia.
Lec. 7 Body segmentation Structure of thorax & abdomen.pptRajuPanse
This document provides information on the structure of the thorax and abdomen in insects. It describes the key segments and sclerites that make up the thorax, including the prothorax, mesothorax, and metathorax. Each segment contains a notum, pleura, and sternum. The mesothorax and metathorax each contain a pair of wings. The abdomen is segmented and contains the respiratory and reproductive structures. Spiracles are located between abdominal segments for respiration. The reproductive structures are located on segments 8-9. Abdominal appendages include styli, collembolan appendages, cornicles, gills, prolegs, cerci, and others.
This document provides a summary of key topics covered in Labs 8-15 of a biology course, including:
- Phyla Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Nematoda, and Arthropoda
- Characteristics of sponges, jellyfish, flatworms, segmented worms, mollusks, roundworms, and arthropods
- Bilaterian symmetry and body cavities
- Phyla Echinodermata and Chordata, including sea stars, sea urchins, lancelets, and vertebrate classes
- Mammalian organ systems like muscles, skin, blood vessels, heart
This document provides instructions for dissecting a frog. It details each step, including: measuring the frog; determining its sex; locating external features of the head; opening the mouth and identifying structures; removing and measuring the tongue; making cuts along the body and pinning back the skin and muscles to expose the organs; locating and identifying organs of the digestive system like the stomach, intestines, liver and gallbladder; finding the heart and its chambers; locating the lungs, kidneys and reproductive organs; and carefully removing the brain from the skull. The goal is to methodically dissect the frog and identify all its internal structures and organs.
Arthropods are the most diverse and abundant group of animals. They make up over 80% of all known animal species. Arthropods are found in nearly all habitats on Earth and have been highly successful in adapting to life on land, in water, and air. They have a segmented body, jointed appendages, a hard exoskeleton that is periodically molted, and bilateral symmetry. Insects are the largest class of arthropods, making up over 50% of all known animal life. Insects go through complete or incomplete metamorphosis from egg to adult. Their body segments are specialized for different functions and they have an exoskeleton, jointed legs, and often wings.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
Crash-Course for AIPMT & Other Medical Exams 2016 (Essentials cockroach)APEX INSTITUTE
Dear Students/Parents
We at 'Apex Institute' are committed to provide our students best quality education with ethics. Moving in this direction, we have decided that unlike other expensive and 5star facility type institutes who are huge investors and advertisers, we shall not invest huge amount of money in advertisements. It shall rather be invested on the betterment, enhancement of quality and resources at our center.
We are just looking forward to have 'word-of-mouth' publicity instead. Because, there is only a satisfied student and his/her parents can judge an institute's quality and it's faculty members coaching.
Those coaching institutes, who are investing highly on advertisements, are actually, wasting their money on it, in a sense. Rather, the money should be invested on highly experienced faculty members and on teaching gears.
We all at 'Apex' are taking this initiative to improve the quality of education along-with each student's development and growth.
Committed to excellence...
With best wishes.
S . Iqbal
( Motivator & Mentor)
The document provides background information and procedures for dissecting an earthworm to observe its external and internal structures. It begins with the scientific classification of Lumbricus terrestris (night crawler or dew worm). The objectives are to describe organs and name systems. Materials for dissection are listed. The background discusses earthworm anatomy including segments, clitellum, circulatory and digestive systems, nervous system, excretory organs, and respiration through the skin. The procedure guides observation of external features and internal dissection to locate specific organs like the hearts, blood vessels, pharynx, crop, gizzard, intestine, nerve cord, ganglia, nephridia, ovaries, and testes.
This document provides instructions and background information for dissecting a frog. It outlines the materials needed and guides the reader through examining the frog's external anatomy, internal mouth, and conducting the dissection. The dissection procedure involves making cuts to expose the internal organs, removing organs like the liver and digestive tract, and opening the cranium to view the brain. A worksheet is included to have students record their observations at different steps.
This document provides instructions and diagrams for dissecting a grasshopper. It describes the external and internal anatomy of grasshoppers, identifying structures like the compound eyes, antennae, mouthparts, legs, spiracles, and reproductive and digestive organs. The dissection process involves removing the exoskeleton and cutting along the abdomen to expose the internal organs.
The document provides instructions and background information for dissecting an earthworm to observe its external and internal structures. Key organs and systems that will be examined include the circulatory system with five pairs of hearts, the digestive system containing a pharynx, esophagus, crop, gizzard and intestine, the nervous system with a ventral nerve cord and ganglia, the excretory nephridia, and reproductive organs like ovaries, testes, sperm grooves and genital pores. The purpose is to describe the appearance of various organs and name the parts of different systems like circulatory, digestive and nervous.
The document provides instructions for dissecting a frog. It begins by describing how to determine the frog's sex by examining its forelegs. The external anatomy is then explored, labeling structures like the eyes, eardrums, nostrils, and skin coloration. Next, the internal mouth structures are located and labeled, including the tongue, teeth, and openings. The digestive, circulatory and respiratory systems are then dissected and their main organs and structures are identified and labeled in diagrams, such as the liver, stomach, intestines, lungs and heart. Finally, the urinary and reproductive systems are briefly described.
This document provides information on the external and internal anatomy of the American cockroach (Periplaneta americana). Externally, it has a flattened body with a hardened exoskeleton, compound eyes, antennae, wings, and three pairs of legs. Internally, it has open circulatory and respiratory systems that allow for gas exchange through tracheae and spiracles. The nervous system consists of a brain, ventral nerve cord, and ganglia. The digestive system includes a foregut, midgut, and hindgut for ingestion and breakdown of food. Reproduction is dioecious with separate male and female sexes.
This document provides instructions for a regional dissection of the back, shoulder, and spinal cord regions of the human body as part of a medical gross anatomy course. It outlines the goals and steps for dissecting the muscles, nerves, vessels, bones and joints in these areas over several class periods. The dissection is designed to teach students the anatomical structures and their relationships through direct observation and manipulation of a cadaver.
This lesson plan introduces students to the nervous systems and sensory organs of different animal phyla. It begins with an overview of the human nervous system and a discussion of senses. Students then observe models of representative species from different phyla to learn about their sensory abilities, how sensory information is processed, and how they respond to stimuli. The lesson focuses on 9 animal phyla in particular, starting with Chordata which includes mammals like rats, dogs, and horses. The summary recaps what was learned about chordate nervous systems and previews that the next part will cover the remaining phyla.
This document discusses the anatomy and structures of the insect head and appendages. It begins by describing how the insect body is segmented and then grouped into three main tagmata: the head, thorax, and abdomen. It then focuses on the structures and segmentation of the insect head, including the sclerites, sutures, mouthparts, and types of heads based on mouthpart positioning. The document also discusses the antennae and its various modifications, as well as the structures and modifications of the legs between different insect orders.
The document discusses different types of zooids found in polyps and medusae, including gastrozooids, dactylozooids, gonozooids, pneumatophores, nectocalyces, bracts, and gonophores. It also describes pseudo-metamerism and metamerism, and the differences between complete and incomplete metamerism. Theria and Prototheria are defined, with their distinguishing characteristics listed. Theria include mammals that give birth to live young and have mammary glands, while Prototheria lay eggs and have mammary glands without teats. Examples of each group are given.
The document provides instructions for dissecting a frog to observe and identify its external and internal structures and organs. Key steps include: pinning down the frog and making cuts to open the body cavity; locating organs like the heart, lungs, digestive organs in the stomach, intestines, liver and gallbladder; and identifying circulatory and respiratory systems before disposal of materials and cleanup. The purpose is to describe and name the organs that make up the frog's various body systems through hands-on dissection.
Unit-1 Master of forestry(Entomology) final.pptxhimkantipoudel
This document provides an overview of insect morphology and physiology. It begins by defining entomology and forest entomology, and describing the scope of forest entomology. It then discusses the external morphology of insects, including their body surface, segmentation, head, thorax, abdomen and appendages. The document also describes the internal systems of insects, focusing on the digestive system including the foregut, midgut and hindgut, as well as the respiratory system consisting of trachea and spiracles, and the nervous system composed of a nerve cord and ganglia.
Lec. 7 Body segmentation Structure of thorax & abdomen.pptRajuPanse
This document provides information on the structure of the thorax and abdomen in insects. It describes the key segments and sclerites that make up the thorax, including the prothorax, mesothorax, and metathorax. Each segment contains a notum, pleura, and sternum. The mesothorax and metathorax each contain a pair of wings. The abdomen is segmented and contains the respiratory and reproductive structures. Spiracles are located between abdominal segments for respiration. The reproductive structures are located on segments 8-9. Abdominal appendages include styli, collembolan appendages, cornicles, gills, prolegs, cerci, and others.
This document provides a summary of key topics covered in Labs 8-15 of a biology course, including:
- Phyla Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Nematoda, and Arthropoda
- Characteristics of sponges, jellyfish, flatworms, segmented worms, mollusks, roundworms, and arthropods
- Bilaterian symmetry and body cavities
- Phyla Echinodermata and Chordata, including sea stars, sea urchins, lancelets, and vertebrate classes
- Mammalian organ systems like muscles, skin, blood vessels, heart
This document provides instructions for dissecting a frog. It details each step, including: measuring the frog; determining its sex; locating external features of the head; opening the mouth and identifying structures; removing and measuring the tongue; making cuts along the body and pinning back the skin and muscles to expose the organs; locating and identifying organs of the digestive system like the stomach, intestines, liver and gallbladder; finding the heart and its chambers; locating the lungs, kidneys and reproductive organs; and carefully removing the brain from the skull. The goal is to methodically dissect the frog and identify all its internal structures and organs.
Arthropods are the most diverse and abundant group of animals. They make up over 80% of all known animal species. Arthropods are found in nearly all habitats on Earth and have been highly successful in adapting to life on land, in water, and air. They have a segmented body, jointed appendages, a hard exoskeleton that is periodically molted, and bilateral symmetry. Insects are the largest class of arthropods, making up over 50% of all known animal life. Insects go through complete or incomplete metamorphosis from egg to adult. Their body segments are specialized for different functions and they have an exoskeleton, jointed legs, and often wings.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
This presentation was provided by Rebecca Benner, Ph.D., of the American Society of Anesthesiologists, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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rat_entire_dissection.doc.docx
1. Dissection of the Rat
Introduction
In this laboratory exercise, the anatomy of the rat will be examined in some detail. You may recall that in your first-year biology course
you dissected a grass frog and a fetal pig. You may recognize and remember structures that you learned during that dissection. In
Biology 3A, a much more detailed look at
mammalian anatomy will be conducted. You will
get to know and love your preserved rat over
the course of this dissection.
The classification of the Rat
( Rattus norvegicus)
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Mammalia
Order Rodentia
Family Muridae
Genus Rattus
Species norvegicus
The lab books and diagrams available to you
are supplemental. You are expected to follow
the directions in this lab. You will be held responsible for being able to locate
all the structures. You are expected to have exhausted all possibilities in
attempting to located structures before asking for assistance. Using the
available material, instructions and diagrams, most students will be able to
locate many structures for themselves. If after an earnest effort, you cannot
find a structure, ask for assistance. Remember, this is a learning
experience; it is quite permissible to discuss and observe other students'
specimens. Compare your dissection with others, for animals often differ, be
sure to look at animals of the opposite sex, you will be responsible for both
sexes on the lab practical.
The specimen you will receive is a preserved double-injected specimen.
Double injected refers to the arteries being filled with a red latex, and the
veins being filled with blue latex. You will notice various incisions on the
external surface of the rat where the latex was injected.
The rat is a vertebrate, which means that many aspects of its structural
organization are common with all other vertebrates, including man. The
similarity of structures among related organisms shows evidence of common
ancestry. In a way, studying the rat is like studying a human. As the leading
theme of this lab, ask yourself: for every structure observed in the rat, there
is an equivalent structure in your own body - what is the structure and where
is it located.
As the second leading theme, pay attention to the relationships among
organs and groups of organs. Structural parts are not "just there" in random
locations. Their specific layout within the body contributes to making certain
functions possible. Therefore, for every structure seen, you should
determine the following:
● What organ system it belongs to
● How it relates to other components
● Its general function
● Its specific function (if applicable
Name __________________________________ Date _________
Dissection
Dissecting tools will be used to open the body cavity of the
rat and observe the structures. Keep in mind that dissecting
does not mean "to cut up"; in fact, it means, "to expose to
view". Careful dissecting techniques will be needed to
observe all the structures and their connections to other
structures. You will not need to use a scalpel. Contrary to
popular belief, a scalpel is not the best tool for dissection.
Scissors serve better because the point of the scissors can
be pointed upwards to prevent damaging organs
underneath. Always raise structures to be cut with your
forceps before cutting, so that you can see exactly what is
underneath and where the incision should be made. Never
cut more than is necessary to expose a part.
Grading
Your grade on this laboratory will be assessed per the class
participation (observed daily) with checkpoints evaluated.
Glossary of Terms
Dorsal: toward the back / Ventral: toward the belly
Lateral: toward the sides /Median: near the middle
Anterior: toward the head /Posterior: toward the
hind end (tail)
Superficial: on or near the surface
Deep: some distance below the surface
Sagittal: relating to the midplane, bisects the left
and right sides
Transverse: relating to the plane separating
anterior and posterior
Horizontal: relating to the plane separating dorsal
and ventral
Proximal: near to the point of reference / Distal: far
from the point
Caudal: toward the tail end
Pectoral: relating to the chest and shoulder region
Pelvic: relating to the hip region
Dermal - relating to the skin
Longitudinal - lengthwise
Right & Left - refers to the specimen's right and
left, not yours
Abdominal Cavity - related to the area below
(posterior) the ribcage
Thoracic Cavity - related to the area above
(anterior) the ribcage
2. Rat External Anatomy
Procedure: Obtained your rat. Rinse it off with water and place it in your dissecting pan to observe the general
characteristics. Make sure you know each of the highlighted words.
The rat's body is divided into six anatomical regions; Locate the:
cranial region – head
cervical region – neck
pectoral region - area where front legs attach
thoracic region - chest area
abdomen - belly
pelvic region - area where the back legs attach
Locate each of the regions:
1. Note the hairy coat that covers the rat and the sensory hairs (whiskers)
located on the rat's face, called vibrissae.
2. The mouth has a large cleft in the upper lip which exposes large front incisors.
Rats are gnawing mammals, and these incisors will continue to grow for as long
as the rat lives.
3. Note the eyes with the large pupil and nictitating membrane found at the inside
corner of the eye. This membrane can be drawn across the eye for protection.
The eyelids are like those found in humans.
4. The ears are composed of the external part, called the pinna.
5. Locate the teats on the ventral surface of the rat. Only females have teats.
6. Examine the tail, the tails of rats do not have hair. Though some rodents, like
gerbils, have hair on their tails.
7. Locate the anus, which is ventral to the base of the tale.
8. In the female, find the vaginal opening. This will be seen between the anus, at
the base of the tail, and the opening of the urethra, which is more ventral.
9. On males, you will find a large pair of scrotal sacs which contain testes. Just
anterior to the scrotal sacs is the prepuce, which is a bulge of skin surrounding
the penis.
The Muscular and Skeletal System of the Rat
Procedure: Skinning the Rat
You will carefully remove the skin of the rat to expose the muscles below. This task is best accomplished with
scissors and forceps where the skin is gently lifted and snipped away from the muscles. You can start at the
incision point where the latex was injected and continue toward the tail. Use the lines on the diagram to cut a
similar pattern, avoiding the genital area. Gently peel the skin from the muscles, using scissors and a probe to
tease away muscles that stick to the skin.
1. Biceps brachii - located on the anterior surface of the humerus.
2. Triceps brachii - located on the sides and back of the upper arm.
3. Spinotrapezius - located across the dorsal thoracic region of the rat.
4. Latissimus dorsi - located posterior (and partially covered) by the spinotrapezius.
5. Biceps femoris - located on the side of the thigh, in two bundles
6. Tibialis Anterior - located on the front of the leg.
7. Gastrocnemius - located on lower leg, bulk of the calf muscle. Attaches to heel by the Achilles Tendon.
8. External Oblique - located on the sides of the abdomen.
9. Gluteus Maximus - located on the lower back and rear.
10. Pectoralis Major/Minor - located in chest
Pin the muscles listed above on a skinned rat and identify each.
Place a check mark in boxes to indicate you have
located the structure. At each checkpoint, have
your teacher evaluate.
3. Procedure: Exposing the bones of the leg.
Procedure: Carefully tease away the biceps femoris and gastrocnemius to expose the 3 leg bones: Tibia, Fibula,
and Femur and the small patella (kneecap). You can also see the ligaments around the knee that attach the bones of
the lower leg to the femur and the achilles tendon which attaches the gastrocnemius to the ankle.
Note that the joint of the hip is called a ball and socket joint. Examine how the bones fit into the pelvis.
*** Study the diagram to learn the bones of the rat.
Bones exposed and identified.
Structures of the Head and Neck
4. 1. Locate the salivary glands, which on the sides of the neck, between muscles. Carefully remove the skin of
the neck and face to reveal these glands. Salivary glands are soft spongy tissue that secrete saliva and
amylase (an enzyme that helps break down food). There are three salivary glands -
the sublingual, submaxillary, and parotid.
2. Find the lymph glands which lie anterior to the salivary glands. Lymph glands are circular and are pressed
against the jaw muscles. They are not always visible in the rat.
3. Tease away the muscles of the neck to reveal the trachea. The trachea is identifiable by its ringed cartilage
which provides support. The esophagus lies underneath the trachea, though it is easier to locate in the
abdominal cavity where it enters the stomach.
4. Locate the larynx, which is just anterior to the trachea. The larynx is the voice box, and it allows rats to
making squeaking noises.
Pin the salivary glands, the larynx and the trachea.
Checkpoint:
1. What are the four bones in the hind limb of the rat? ___________________________
2. What are the three bones in the forelimb of the rat? ___________________________
3. Where does the trachea lead? ___________________ The esophagus? ______________
4. What feature do you find on females, but not males? ________________
5. What tendon connects the gastrocnemius to the calcaneus? ______________
6. What muscle was removed to expose the femur? __________________
7. What two muscles can be found on the dorsal side of the rat? __________________
8. What muscle covers the ventral, abdominal region? ______________________
9. What muscle covers the ventral, pectoral region? ________________________
10. What structure is responsible for rat vocalization? ______________________
5. Rat Dissection - The Thoracic Organs
Procedure: Cut through the abdominal wall of the rat following the incision marks in the picture. Be careful not to cut too
deeply and keep the tip of your scissors pointed upwards. Do not damage the
underlying structures. Once you have opened the body cavity, you will need to rinse it
in the sink.
1. Locate the diaphragm, which is a layer of muscle that separates the thoracic from
the abdominal cavity.
2. The heart is centrally located in the thoracic cavity. The two dark colored chambers
at the top are the atria (single: atrium), and the bottom chambers are the ventricles.
The heart is covered by a thin membrane called the pericardium. (We will come back
to the heart later.)
3. Locate the thymus gland, which lies directly over the upper part of the heart. The
thymus functions in the development of the immune system and is much larger in
young rats than it is in older rats.
4. The lungs are spongy organs that lie on either side of the heart and should take up
most of the thoracic cavity.
The Abdominal Organs
1. The coelom is the body cavity within which the viscera (internal organs) are located.
The cavity is covered by a membrane called the peritoneum, which is very thin and
web-like, you may need to use forceps to remove some of this membrane to see the
organs clearly.
2. Locate the liver, which is a dark colored organ suspended just under the diaphragm.
The liver has many functions, one of which is to produce bile, which aids in digesting
fat. The liver also transforms wastes into less harmful substances. Rats do not have a gall bladder, which is used for
storing bile in other animals. There are four parts to the liver:
median or cystic lobe - located at the top, there is an obvious central cleft
left lateral lobe - large and partially covered by the stomach
right lateral lobe - partially divided into an anterior and posterior lobule, hidden from view by the median lobe
caudate lobe - small and folds around the esophagus and the stomach, seen most easily when stomach is raised
3. The esophagus pierces the diaphragm at a spot called the hiatus and moves food from the mouth to the stomach. It
is easiest to locate where it enters the stomach.
4. Locate the stomach on the left side just under the diaphragm.
The functions of the stomach include food storage, physical
breakdown of food, and the digestion of protein.
The outer margin of the curved stomach is called the greater
curvature, the inner margin is called the lesser curvature. You
can make a slit in the stomach and see what is inside it. Most of
the contents should be partly digested rat food.
At each end of the stomach (on the inside) is muscular valve.
The opening between the esophagus and the stomach is called
the cardiac sphincter. The opening between the stomach and
the intestine is called the pyloric sphincter.
5. The spleen is about the same color as the liver and is
attached to the greater curvature of the stomach. It is associated
with the circulatory system and functions in the destruction of
blood cells and blood storage
A person can live without a spleen, but they're more likely to get
sick as it helps the immune system function.
6. The pancreas is a brownish, flattened gland found in the
tissue between the stomach and small intestine. The pancreas
produces digestive enzymes that are sent to the intestine via
small ducts (the pancreatic duct). The pancreas also secretes
insulin, which is important in the regulation of glucose
metabolism.
7. The small intestine is a slender coiled tube that receives partially digested food from the stomach (via the pyloric
sphincter). The coils of the small intestine are held together by a membrane called the mesentery.
6. The small intestine has three sections: duodenum, jejunum and ileum, (Listed in order from the stomach to the large
intestine.) The duodenum is the first stretch of the intestine leading from the stomach, it is mostly straight. The jejunum
and ileum are both curly parts of the intestine, with the ileum being the last section before the small intestine becomes the
large intestine.
8. Locate the colon, which is the large greenish tube that extends from the small intestine and leads to the anus. The
colon is also known as the large intestine. Food entering the colon from the small intestine is controlled by the ileocecal
valve. The colon is where the finals stages of digestion and water absorption occurs and it contains a variety of bacteria to
aid in digestion. The colon consists of five sections:
cecum - large sac where the small and large intestine meet (the ileocecal valve regulates passage of materials)
ascending colon – food travels upward.
transverse colon – a short section that is parallel to the diaphragm
descending colon – the section of the large intestine that travels back down toward the rectum.
rectum - the short, terminal section of the colon that leads to the anus. The rectum temporarily stores feces before they
are expelled from the body.
Pin the organs of the digestive cavity.
Checkpoint: Test Your Knowledge
1. Lies under the stomach and secretes insulin ____________________________
2. The section of large intestine between the ascending and descending colon: ________________________
3. Connects the mouth to the stomach: ____________________________________
4. Thin membrane that covers the heart: ______________________________________
5. Muscle that separates the abdominal cavity from the thoracic cavity: ______________________________
6. Destroys old blood cells and lies within the folds of the small intestine: _____________________________
7. The lobe of the liver that has an obvious central cleft: _______________________________________
8. Another name for the large intestine: _______________________________________________
9. Organs of the respiratory system that lie on either side of the heart: _______________________________
10. Large organ of the thoracic cavity that lies just under (posterior) to the diaphragm: ___________________
11. The last section of the colon, storage of feces: ___________________________________
12. The pouch of the colon that is found just where the small intestine joins it: _________________________
13. Valve that regulates the passage of food from the stomach to the small intestine: ___________________
14. Thin membrane that covers the organs of the abdominal cavity: _____________________________
15. The first section of the small intestine: _______________________________________________
16. The section of large intestine that is parallel to the diaphragm: ______________________________
17. Structure related to the immune system, lies at the top of the heart: _______________________________
18. Valve the regulates passage of materials from the small to the large intestine: _______________________
19. The opening in the diaphragm where the esophagus passes through: ____________________________
20. Section of small intestine that comes after the duodenum: _________________________________
7. Urogenital System
The excretory and reproductive systems of vertebrates are closely integrated
and are usually studied together as the urogenital system. However, they do
have different functions: the excretory system removes wastes and the
reproductive system produces gametes (sperm & eggs) and provides an
environment for the developing embryo.
Excretory Organs
1. The primary organs of the excretory system are the kidneys. Locate these
large bean shaped structures located toward the back of the abdominal cavity
on either side of the spine. Renal arteries and veins supply the kidneys with
blood.
Trace these vessels to where they connect to the aorta and vena cava
(two large vessels of the abdominal cavity)
2. Locate the delicate ureters that attach to the kidney and lead to the
bladder. Wiggle the kidneys to help locate these tiny tubes.
3. Procedure: Remove a single kidney (without damaging the other organs)
and dissect it by cutting it longitudinally. Locate the cortex (the outer area)
and the medulla (the inner area).
4. The urethra carries urine from the bladder to the urethral orifice (this orifice is found in different areas
depending on whether you have a male or female rat).
5. The small yellowish glands embedded in the fat atop the kidneys are the adrenal glands.
**You are responsible for knowing the structures of both sexes. Locate the structures in your own rat and then
observe the structures of the opposite sex from another group's rat.
The Reproductive Organs of the Male Rat
1. The major reproductive organs of the male rat are the testes (singular: testis) which are located in
the scrotal sac. Cut through the sac carefully to reveal the testis. On the surface of the testis is a coiled tube
called the epididymus, which collects and stores sperm cells. The tubular vas deferens moves sperm from
the epididymus to the urethra, which carries sperm though the penis and out the body.
2. The lumpy brown glands located to the left and right of the urinary bladder are the seminal vesicles. The
gland below the bladder is the prostate gland and it is partially wrapped around the penis. The seminal
vesicles and the prostate gland secrete materials that form the seminal fluid (semen).
The Reproductive Organs of the Female Rat
1. The short gray tube lying dorsal to the urinary bladder is the vagina. The vagina divides into two uterine
horns that extend toward the kidneys. This duplex uterus is common in some animals and will accommodate
multiple embryos (a litter). In contrast, a simple uterus, like the kind found in humans has a single chamber for
the development of a single embryo.
2. At the tips of the uterine horns are small lumpy glands called ovaries, which are connected to the uterine
horns via oviducts.
Pin the organs of the urogenital system.
Checkpoint and Further Investigation
1.What tube connects the kidney to the bladder? ____________________________
8. 2. What vessels connect to the kidney? ________________________________
3. Urine exits through what external opening on both male and female rats? _________________________
4. Compare the location of the urethral orifice on male and female rats.
5. What is the function of the excretory system?
6. Why are the kidneys considered major organs responsible for maintaining HOMEOSTASIS? (you may need
to look this up.)
7. The word "vasectomy" is derived from the tube known as the vas deferens. What is a vasectomy?
8. How does the anatomy of a female rat differ from that of a human?