2. Arteries differ from veins since arteries are smaller than veins, have thicker walls, and are elastic. However, veins have thinner walls and are larger compared to veins.
3. The auricle's purpose is to increase the blood holding capacity inside the atria when the heart pumps blood.
4. The left side of the heart is larger compared to that of the right side of the heart. The atria is also larger compared to the ventricles too. Lastly, the auricles of the atria are more easily visible than that of the ventricles.
5. a. When exiting from the coronary sinus, you will notice that it is inferior to the fat and anterior to the heart. You can also notice a line of fat tracing around the back of the heart, which is also the coronary sinus.
b. When exiting from the inferior vena cava, you will notice it is inferior to the right ventricle and on the right side of the heart. The inferior vena cava has already been cut off the heart, but you can notice where the cut is and where it's original location was.
c. The tricuspid valve is a firm muscle-like substance that is connected to thick muscle known as the papillary muscles. It is connected through the chord tendinae, which are stringy, light fibers that bound the valve to the muscle.
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7. The anchoring of the heart valves is important to prevent blood back flow from occurring. It also helps open and close the valves, and prevents the valve from opening upwards.
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9. The purpose of the semilunar valves is to prevent blood back flow of arterial blood to re-enter the heart.
10. a. If valve disease occurs on the right side of the heart, there would be blood back flow into the body, and gravity would pull the blood down rather than have it circulate regularly. This results in swelling around the feet and ankles.
b. If valve disease occurred on the left side of the heart, it would result in an abundance of deoxygenated blood in the body, since the left side receives oxygenated blood from the lungs. Since the blood would not be oxygenated enough to nurture the body, this may result in breathing complications.
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12. The left side of the heart is bigger than that of the right side. Since the left side pumps blood throughout the whole body, it works harder and therefore is more bigger. Since the right side only pumps blood to the lungs only and does less work, it would be smaller than the right side.
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See videos below:
Sheep Heart Dissection
https://m.youtube.com/watch?v=K1KRKKvoVIM
Cardiac Cycle Explanation
https://www.youtube.com/watch?v=4t3ia_AIazI
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