Dissection of fetal pig - Name:
You will need to show your teacher the following organs:
1.
Diaphragm muscle
2.
Liver
3.
Gallbladder
4.
Stomach
5.
Small Intestine
6.
Large Intestine
7.
Spleen
8.
Kidneys
9.
Heart (identify 4 chambers)
10.
Lungs
11.
Pancreas
12.
Trachea
10 points for each organ and 30 Points for clean-up for a total of 150 points.
Extra Credit: 20 points if your remove the brain INTACT.
The Abdominal Cavity
1. Place your patient on its back so the ventral side (belly) is facing up.
2. With your finger, press along incision line #1 to locate the ribs.
3. With the knife make a small cut along line #1 just big enough to insert the
scissors.
4. With the scissors, cut along incision line #1 (along the base of the ribs).
5. Cut down along incision #2 to the umbilical cord.
6. Cut along incision #3 (around the umbilical cord).
7. Cut along incision #4. The abdominal cavity is now exposed. A thin tissue called
the peritoneum covers the abdominal organs. Did you see it?
8. Rinse the abdominal cavity in running water to remove excess fluids.
9. Locate the diaphragm muscle. Label it on diagram.
10. Locate the liver. Label it on diagram.
11. Locate the gallbladder (behind the central lobe of the liver). Remove the liver
and gallbladder. Label it on diagram
12. Locate the stomach. Label it on diagram. Remove the stomach.
13. Cut open the stomach and examine the contents. Is there anything inside?
14. Locate the small intestine. Label it on diagram. Cut through the messentary
that holds together the intestine and unravel it.
15. Locate the large intestine by following the small intestine to its end. It
includes the cecum and the rectum. Label the large intestine.
16. Locate the pancreas. It is light in color and found beneath the small intestine.
Label it on your diagram.
17. Locate the spleen. It is dark in color and lies to the left (pig's left) of the
stomach. Label it on your diagram
18. Remove the small, large intestine, pancreas, and spleen.
19. Locate the kidneys, they are about the size of a small grape. How many
kidneys does the piggy have (this is not a joke)? Label it on your diagram. Remove
the kidneys.
20. Locate the urinary bladder and the umbilical arteries.
The Thoracic Cavity
21. Use the scissors to cut along incision # 5. You will be cutting through the rib
cage.
22. Next, make incision #6 with the scissors.
23. Separate the diaphragm and spread the rib cage to expose the heart and
lungs.
24. Finally, cut anteriorly (toward the chin) to expose the esophagus, trachea, and
larynx (incision # 7 and 8). Label the trachea on your diagram
25. Locate the heart. You will need to cut through a very thin transparent tissue
called the pericardium. Did you find it? Label it on your diagram.
26. Remove the heart and lungs. Try to keep them held together by the bronchial
tubes and blood vessels. Label the heart and the lungs in your diagram.
27. Separate the heart from the lungs and carefully dissect the heart. Showing all
4 chambers.
The Cranial Cavity (Brain and Spinal Cord)
28. Place your patient on his/her stomach
29. Using the knife, carefully cut along the head and back all the way from the
snout to the tail.
30. Spread the skin away from the skull and the backbone.
31. Using all of your skill as surgeons, cut into the skull and remove the skull in
small pieces until the membrane covering the brain is exposed.
32. Cut the membrane covering the brain to expose the brain itself. If you are
really precise you can remove the brain.
33. Show your teacher.