Sheep Heart Dissection

1.The purpose of the pericardium is to protect the heart, lubricate the outside and prevent it from pumping too large and exploding.
2.Arteries have thicker walls than the veins and are ribbed on the inside.
3.The auricles are to allow the atria to expand and take on more blood.
4.The atria are covered in fat and have more blood vessels exiting around them. The ventricles are larger and have a line of fat across the top.
5a. The vena cava has a large opening that goes into the right atrium.
b. The coronary sinus has a small opening that we could not see into the right atrium.
c.The Tricuspid valve has many of the chordae tendonae attached to it and has cusps.
6.the picture. Even though the bicuspid valve, the main one you see, inst your tricuspid valve, it looks similar.
7.Chordae tendonae are important so the valve does not go backwards when the ventricles are higher in pressure.
8. the picture does not clearly show the bicuspid valve. The bicuspid valve does look similar to the tricuspid valve with chordae tendonae to a lump called the papillary muscle that prevents the valve from going backwards and allow back flow.
9.The semi lunar valves are to prevent back flow from the arteries to the heart.
10.a There is a back up of deoxygenated blood that pools the blood in the veins.
b.The body would not be getting proper oxygen. The person might fain often or always be tired.
12. The left side has a larger ventricle and a thicker wall so it can pump blood out to the body.
13. the picture. left and right ventricles. Bicuspid valve (main). Tricuspid valve (right side) myocardium (meaty looking flesh) endocardium (shiny inside) epicardium (the outside layer)