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Fetal Pig Dissection USE ANY AVAILABLE RESOURCES TO ANSWER THE FOLLOWING Prelab 1. What are unborn pigs called? ____________________________________ 2. How is their age (length of gestation) determined? 3. How long does full gestation take? ____________________________________ 4. Classify the pig: K__________________________________ P__________________________________ C__________________________________ O__________________________________ F__________________________________ G__________________________________ S__________________________________ 5. Approximately how many piglets does a sow have in a litter? ______________________ 6. Is a pig a biped or quadruped? Explain. ________________________________________ 7. What word means: Pertains to the head? Forward? Toward the snout? Pertains to the tail? Toward the tail? Toward the backbone? Toward the belly? Toward the side? Toward the midline? Near the reference point? Far from the reference area? ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 8. What are these areas called: head area? neck area? upper trunk? middle trunk? lower trunk? tail area? ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 9. Symbol for male? ____________ Symbol for female?___________________ 10. How do you determine the sex of your fetal pig? _________________________________ 11. Is the pig digitigrade, unguligrade, or plantigrade? Explain. 12. Are pigs herbivores, carnivores, or omnivores? Explain. __________________________ 13. Another name for nostrils? ____________________________________ 14. Long, external fold of the ear? ____________________________________ 15. Why is the fetal pig a good specimen to dissect? _________________________________ 16. Tissue that makes up skin? main appendage of skin? ____________________________________ ____________________________________ Go to the following link and complete the following: http://www.whitman.edu/academics/courses-of-study/biology/virtual-pig/ 17. Label the following drawing: Click on “Virtual Fetal Pig Dissection” Go to “Anatomical References” 18. List the four regions on a pig from tail to head. a. __________________________________ b. __________________________________ c. __________________________________ d. __________________________________ 19. Draw a fetal pig in the box and label the following areas: Anterior, Posterior, Dorsal, Ventral Click on “Sexing your pig.” Then click on “Is it male or female.” 20. How do you know if a pig is male or female? _______________________________________________ ___________________________________________________________________________ ____________ Click on the “Digestive System.” Then click on the pig’s head. Keep clicking forward until you reach the page titled, “oral cavity.” Click on the snout to continue. 21. Where are the hard and soft palate located? 5. Click on “Pharynx.” function of the epiglottis? What is the Draw them below. ____________________________ ____________________________ ____________________________ ____________________________ Click on the abdomen. Keep clicking on the forward button until you reach the section titled, “Lift the Liver” 6. What is under the liver? ____________________________ 7. How long is the small intestine? ________________________ 8. The large intestine is ( shorter , longer ) than the small intestine. Circle the correct answer. 9. Write the function for each of the following. Click on the “excretory system.” 10. Describe how the kidneys look and where they are located. ___________________________________________________________________________ _________ 11. Relative to the kidneys, where are the ureters located? ___________________________________________________________________________ _________ 12. Relative to the ureters, where is the bladder located? ___________________________________________________________________________ _________ Click on the “circulatory system.” Then click on the pig. You can rotate the pig 90 degrees for a side view. 13. Where is the pericardial sac located? 14. Relative to the heart, where are the lungs located? 15. Draw and label a heart with the following terms: right atrium, right ventricle, left atrium, left ventricle, aorta, coronary artery. Using arrows, show the path of blood from the heart, to the Lungs lungs, and back to the heart going through the appropriate chambers. 16. Deoxygenated blood enters the heart through the ____________________________, then goes to the _________________________. It gets pushed into the ___________________ where it gets oxygenated. Then it returns to the heart through the _______________________________, then goes to the ________________________________. Then it is pumped through the _______________________ to the rest of the body. Click on “reproductive system.” 17. What hormone(s) are produced by the ovaries? ____________________________________________ 18. What hormone(s) are produced by the testes? _____________________________________________ Click on “respiratory system.” 19. List the path of air from the mouth to the aveoli. Function Small intestine Large intestine Gall bladder Spleen Pancreas Mouth ________________ ________________ bronchi Alveoli ___________________ 20. What is the function of the diaphragm? ___________________________________________________________________________ __________ Click on “nervous system.” Then click on the cranial section. 21. What membrane covers the brain? __________________________________ 22. Draw/describe the lobes of the brain. Label the following lobes: frontal, temporal, occipital, parietal Frontal: ___________________________________________ Temporal: ________________________________________ Occipital: _________________________________________ Parietal: __________________________________________ 23. How does the human brain differ from the brains of most mammals? 24. What is the function of the corpus callosum?