1. The purpose of the pericardium is to hold and protect the heart. It secretes a fluid that lubricates the heart and reduces friction.
2. Arteries appear larger and thicker in comparison to veins because they need to withstand the pressure to push blood out to the body. The veins carry blood from the tissue to the heart.
3. The auricle is on the anterior surface of each atrium and increases the capacity slightly so that the atrium can hold more blood.
4. The main difference between the atria and ventricles is that the atria is way smaller and skinnier. The ventricles need to push blood out of the heart to the body and lungs so they were bigger.
5.
a) The coronary sinus was located on the posterior side of the heart and was hidden behind a layer of fat.
b) The inferior vena cava was not visible on our heart because it was cut away. But, it should have been on the right side of the inferior part of the heart.
c) The tricuspid valve was located on the right side of the heart and between the right atrium and ventricle. It has three flaps that open and close to push blood through. It is anchored down by chordae tendinae which connect to papillary muscles.
6. Drawing of tricuspid valve
7. The anchoring of the heart valves by the chordae tendinae and papillary muscle is important because it prevents the valves from falling back into the atria when closed and keeps them in place.
8. The bicuspid valve is similar to the tricuspid valve except the bicuspid valve has two flaps while the other has three.
9. The semi-lunar valves prevent blood from re-entering the ventricles. The pulmonary valve is located pulmonary artery and the aortic in the aorta.
10.
a) The right side of the heart is responsible for receiving deoxygenated blood from the body and pumping it to the lungs. If the valve on the right side is faulty, blood can get backed up and could cause swelling to occur in the feet and ankles.
b) The left side of the heart is responsible for receiving oxygenated blood from the lungs and pumping it to the rest of the body. If the valve on the left side is faulty, it could cause blood to flow back to the lungs and/or effect the rest of the body as it can't properly send oxygenated blood to the body.
11. When we cut into the aorta, we found the aortic semilunar valve in it. The entrance to the right and left coronary arteries came from the anterior wall and lead to the outside of the heart. We were able to locate chordae tendinae and papillary muscle directly beneath each valve. They were pretty obvious and we could tug at the chordae tendinae with a probe. The chordae tendinae connects the valve to the muscle.
12.The right side of the heart deals with the deoxygenated blood that comes from the body and sends it to the lungs to pick up oxygen. The left side deals with the oxygenated blood from the lungs and sends it to the rest of the body. The left side of the heart is bigger because it needs to push blood to the rest of the body.
13.
Cardiac Cycle
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