Sheep Heart Dissection Questions

1. The purpose of the pericardium is to contain and protect the heart.
2. Arteries are bigger and flow blood to the body, while veins are smaller they have greater volume and flow blood back to the heart.
3. Auricles are an expansion of the atria to allow extra volume inside the chamber, the right auricle collects deoxygenated blood and sends it into the atria.
4. Structural differences between atria and ventricles include: ventricles have thicker walls, ventricles are inferior to the atria, the left ventricle is larger because it has to work harder to pump blood throughout body.
5. The coronary sinus resides on the right atria, and it drains blood from it. The inferior vena cava is an artery at the bottom of the heart which delivers blood from the inferior parts of the body to the heart. The tricuspid valve is a valve surrounded by papillary muscle and has a lot of chordinae tendinae at the bottom of it.
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7. The "anchoring of the heart valves by the chordinae tendinae and papillary muscle keeps the valve and place, and supports it to help it be stronger.
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9.The function of the semi-lunar valves is to prevent back flow from the arteries back into the ventricles as the heart tries to pump blood.
10 A. If valve disease was to occur on the right side of the heart a person might experience swelling of the ankles and feet, along with water retention and high sodium retention.
    B. If valve disease occurred in the left side of the heart it could cause chest pain as well as dizziness and shortness of breath.
11. After cutting down the anterior wall of the aorta, I could see part of the left ventricle. We could seethe entrance to the left coronary arteries and the left semi-lunar valve. It has three cusps and resides by the artery. the bicuspid valve had a lot of chordinae tendinae attached to its base and the valve itself was surrounded by papillary muscle for extra support.
12. The left side of the heart differs from the right because it is much larger, because it has to pump harder. The walls of the left ventricle are thicker than the walls of the right. The right side of the heart contains the AV and SA nodes and pumps blood to lungs, while the left side pumps to the rest of the body.
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Unit Three Reflection

In this unit we learned about the circulatory system and the respiratory system. We learned how blood travels through the various types of vessels like arteries and veins. We studied the anatomy and physiology of the heart in detail as well as the lungs and other areas of the body. We learned how important diet, exercise and clean living are in order to ensure cardiovascular health. Lack of exercise, poor diet and other factors can contribute to things like atherosclerosis and hypertension, which are both cardiovascular diseases. During the direction of the sheep heart we got to witness fist hand what the chambers and vessels of the heart really look like, which helped us understand its functions better. Promoting cardiovascular health is really all about the day-to-day, and taking healthy preventative measures to prevent cardiovascular diseases and defend yourself against heart attacks or strokes. Being healthy, eating right, not smoking, exercising and resting all can help[ promote good cardiovascular health. I would like to learn more about the respiratory system, which we seemed to sort of rush through, because I'm interested in learning how the lungs filter and absurd the air we breathe. This was a pretty straightforward unit for me and probably one of my only weakness was not preparing more for the temp checks. Being more prepared for those would've resulted in a better understanding of all the information and probably would've helped better my test score. So next unit I will definitely take the temp checks a little more seriously and continue to take extensive notes and keep up with homework. My goal for the rest of the semester would be to try and keep/raise my grade from the level that it is currently at, and I want to start studying for the final as soon as possible. I want to make sure that I am prepared for all big assignments coming up so that my grade stays strong. I'll also try and get more sleep because I told myself last unit that I would and I haven't exactly kept that promise very well.