Heart Dissection Lab Questions

1. The purpose of the pericardium is that it secretes a fluid that helps lubricate the heart therefore reducing friction.

2. Arteries differ from veins in that veins have thinner walls than arteries because arteries need thicker walls in order to deliver blood to the entire body.

3. The function that the auricle serves is that is increases the capacity of the atrium, which allows the blood it can hold to increase.

4. The auricle, which is an extension of the atrium, is visible on the outside of the heart while the ventricles are not visible until an individual looks inside the heart. Both the left atrium and ventricle has more muscle surrounding it than the right side because it requires more power to pump the blood throughout the entire body. While the right atria receives oxygenated blood, the right ventricle discharges the blood. On the other hand, the left atria receives oxygen rich blood, and the ventricle discharges the blood.

6.  When you cut into cross sections, an individual is able to see the biscuspid valve.

7. The importance of "anchoring" the heart valves by the chordae tendinae and the papillary muscles is that it prevents the back flow of blood within the heart. Both the chordae tendinae and the papillary muscles contract to close the valves and with out either being attached, the valves would not be able to close.

8.  We are seeing inside of the left atrium and then the bicuspid valve, which is held to the walls by the chordinae tendinae and the papillary muscles.

9. The function of the semilunar valves is that it prevents arterial blood from re-entering the heart. It has two different types: the pulmonary semilunar valve and the aortic semilunar valve.

10.
a. There would be swelling in the feet and ankles because the blood that comes from the body enters through the superior and inferior vena cava, and since there is a regurgitation of the blood within the heart, the blood then leaks back into the body and causes swelling.

b. If the problem occurred in the left side, there would be serious complications due to the fact that the individual does not have sufficient oxygen in their blood.

11. We found an opening in the left ventricle, and it was mostly obscured from our view however it has a similar structure to the tricuspid.

12. In the heart, the left and right side differ in that the left side has more muscle because it requires a greater strength to pump the blood to the entire body. While on the right side, it only pumps blood to the lungs making it significantly smaller than the left side of the heart.

13.

 

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