1. The purpose of the pericardium is to hold the heart in place, provide protection, and reduce friction of heart.
2. The main difference between the arteries and veins is that the arteries appear to be larger, as they are thicker and need to carry blood towards the body. The veins are there to return blood to the heart.3. I think that the function of the auricle is that it reenforces the strength of the vessels, so that more blood can be pumped inside of the heart. It allows the heart to expand more.
4. The main visible difference on the outside of the heart between the atria and ventricles was that the ventricles were skinnier, and because of that smaller.
5. a) The coronary sinus was located on the posterior of the heart, right behind the layer of fat.
b) The inferior vena cava was not exactly visible because it was cut off and vacuum sealed. However, it should have been on the right portion of the inferior part of the heart.
c) The tricuspid valve was located in the right side of the heart, and connects the right atrium to the right ventricle. It has three flaps that are pushed open and closed to push blood through to the next chamber. It is connected to the chordate tendinae, which prevent the valve from inverting. These cord like tendons are anchored down onto the papillary muscles.
6. Picture of drawing of tricuspid valve:
7. The anchoring of the valves is important because it prevents them from inverting and closes them tight. The chordate tendinae are strong enough to slam shut the valves.
8. The bicuspid valve is similar to the tricuspid valve in form and function, except for the fact that it has two flaps, where as the tricuspid valve contains three.
9. The semi-lunar valves are important because it prevents the back flow of the blood back to the heart.
10. a) The swelling would occur in the feet or ankles because the blood that flows to the right side of the heart is coming from the body. If the right valve is messed up, the back flow of blood would go back towards the ankle, causing it to swell.
b) If there were on the left side of the heart, there could be a back flow of blood in the lungs, which would cause swelling in the lungs, and ultimately make it much more difficult to breath and send oxygenated blood to the rest of the body.
11. When we cut into the aorta, we examined the two different coronary arteries. We also located the left semilunar valve, which led down through the aorta to the inside of the heart. We were able to stick the probe through and physically see where it went. The chordate tendinae are really strong, and are can open and close the valves. The papillary muscles seem to be strong and sturdy. The chordate tendinae are attached to the papillary muscles.
12. The left side of the heart primarily deals with oxygenated blood. It receives the reoxygenated blood from the lungs and then transports to the body to be used. The right side of the heart receives deoxygenated blood from the rest of the body. It sends the deoxygenated blood to the lungs, where it returns to form the lungs to the left side of the heart.
13.
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| Cross Section of Interior of Heart |
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| Anterior side of Heart |
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| Posterior Side of Heart |
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