BSN C228 - A&P II Task 1: Dissections. Questions and Answers. Western Governors University.

BSN C228 - A&P II Task 1: Dissections. Questions and Answers. Western Governors University. 1. Discuss your dissection of the sheep heart and the cardiovascular system of the fetal pig by doing the following: a. Describe the similarities and differences between the fetal pig heart and the sheep heart. The sheep’s heart and the fetal pig’s heart are similar in their anatomical structures. Both of them have 2 atriums and 2 ventricles, 4 valves and a pulmonary vein and artery, aorta, and inferior and superior vena cava. Both have 3 layers epicardium, myocardium and endocardium. Both have the sulcus – a depression on the surface along the separation of the left and the right ventricles. They differ in their size – fetal pig’s heart is very small and the sheep’s heart is much bigger, the size of a small human fist. The fetal pig’s heart has the ductus arteriosus between the aortic arch and the pulmonary artery. b. Describe the four valves of the heart, including their name, location, and function. The heart has 2 atrioventricular valves and 2 semilunar valves. Atrioventricular valves are between the atriums and the ventricles. They are open during diastole and closed during systole. The tricuspid valve is between the right atrium and the right ventricle. Its function is to allow blood flow from the atrium into the ventricle during diastole and prevent the blood from flowing back into the atrium during systole. The bicuspid valve,