Use it carefully and always cut away from yourself. The heart is found just left of the center of the thoracic cavity. Remove stomach by cuts at junction with esophagus and small intestine, specifically, the duodenum. Also locate the anterior and posterior ends. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. At the esophagus is the cardiac sphincter valve, and at the duodenum is the pyloric sphincter valve.
Thoracic cavity is area between incisions 3 and 5. Return your lab equipment and pig to the supply cart and then thoroughly wash your hands with soap. Lungs are relatively large due to the fact that the bronchial tree is contained within them. Pancreatic juice, made by the pancreas, and bile, made by the liver and stored in the gall bladder, are add to food here to continue digestion. Home Science Tools recommends using for all dissections. Also, isolate pulmonary veins from heart via scissors. However, I am Muslim and do not eat or like pigs as they are swine to me.
Remember that the diaphragm separates the abdominal cavity from the thoracic cavity and it aids in breathing. Moreover, the pancreas is best reached by lifting junction of stomach and small intestine. Pulmonary trunk: Begins at right ventricles. It curves upward and joins the aorta 2 - a vessel which arches from the heart and curves around to go to the lower part of the body -where it is called the abdominal dorsal aorta 9. The objective of this essay is to demonstrate my insight and grasp on the art and science of mentorship practice and the issues encountered during mentoring. Locate the two umbilical arteries that carry blood from the fetal pig to the placenta, and the single umbilical vein that delivers nutrient-rich blood back to the fetal pig. Unless otherwise noted, LibreTexts content is licensed by.
Then, locate pulmonary trunk arising from right ventricle and separate from heart via scissors. Gestation for the fetal pig is 112-115 days. Respiratory System Return now to the neck and thoracic cavity to observe the respiratory organs. Dorsal view of heart in the fetal pig Observations: Fetal Pig Observation Questions All questions within textbook procedure answered below. Follow the umbilical artery toward the pig, you'll find that it branches and a small artery stretches toward the posterior of the pig - this is the ilio-lumbar artery. In the female, the opening is ventral to the anus.
When you are finished with your pig, do not cut the rubber bands! The dissection of the fetal pig in the laboratory is important because pigs and humans have the same level of metabolism and have similar organs and systems. The placenta is the source of food and oxygen for the fetus, and it also serves to get rid of fetal wastes. Clean up your materials and work area. They won't let you down, no matter what they're up against. The renal arteries lead to the kidney.
A pouch shaped organ that rests just underneath and to the pig's left. It is a finger-shaped gland, and creamy white in colour. Does the fetal pig have teeth? On males, the opening is located near the umbilical cord. The function of the spleen is that it is a blood reservoir; it stores and recycles blood for future use. Lift the heart to look on its dorsal side toward the back , you should be able to see the anterior and posterior vena cava, which brings blood from the body back to the heart. Spread the legs and open the pelvic cavity so that you can dissect out the pelvic organs.
The pins are used to tie down smaller pigs, and the string is used to tie down larger pigs. The stomach is responsible for churching and breaking down food. Push the heart to the side to locate two spongy lungs located to the left and right side. The gallbladder connects to the top left portion of the small intestine. Locate the hepatic duct which carries bile from the liver to the gall bladder. Open the stomach and note the texture of its inner walls. Incisions for dissection of fetal pig 5.
The heart is found between the two lungs and protected by rib cage. Locate liver and gall bladder. The caecum has no known function in the pig. It is better to begin with shallow incisions. Two umbilical vessels can be seen in the umbilical cord, and the flattened urinary bladder lies between them. Locating the right chamber via the diagram below.
Non-latex gloves Preserved fetal pigs Dissecting tray Antibacterial soap String Scissors Scalpel Measuring tape Paper towels dissecting pins blunt probe Basic diagram of sections of fetal pig Left Procedure 1. Cut down the pig's abdomen, around the umbilicus, to the middle of the legs. The hepatic artery leads to the liver. The splenic artery leads to the spleen may not be visible 4. The length of the fetal pig can give you a rough estimate of its age. It is covered by a thin tissue called the pericardium. Condom is a barrier device that is commonly used during sexual intercourse to avert pregnancy and.
Locate the entrance to the stomach or esophageal area, the cardiac region which is largest, and the pyloric region where the stomach narrows to join to the small intestine. The final incision will go directly below the ribs. Use a pin to carefully tease away the surrounding muscle and tissue. This can be done so using a scalpel. Otherwise, clean up and return your materials and pig as you did on day 1. Be sure to follow all directions.