Sheep Heart Dissection Video Tutorial

https://www.youtube.com/watch?v=gussycC6joU

Sheep Heart Dissection

What is the purpose of the pericardium?

The pericardium serves as protection for the heart, as it is a two layer liquid filled sac that surrounds the entire muscle. It protects the heart from infection and over-expansion when there is an increase in blood volume. It also serves as a container for the heart.

How do arteries differ from veins in their structure?

Arteries have thicker walls than veins do because there is a higher blood pressure in arteries than in veins, as the blood is being pumped from the heart to the body, and not vice versa.

What function does the auricle serve?

The auricle collects blood in a pouch before transferring it to the left or right ventricle, depending on the auricle(left or right).

What differences between the external structures of the atria and the ventricles do you observe?

Atria is smaller than the ventricles, and there are thicker walls in the ventricles. There is more fat near the atrium.

Picture: Tricuspid valve, including chordate tendinae and the papillary muscle.

Why is the "anchoring" of the heart valves by the chordate tendinae and the papillary muscle important to heart function?
The anchoring of the heart valves by the chordate tendinae and the papillary muscle is important because it keeps the bicuspid valve and the tricuspid valve in place, so blood flow will remain in one direction. 

Picture: Bicuspid Valve

What is the function of the semi-lunar valves?
The semi-lunar valves prevent incorrect blood flow within the heart.

If the valve disease occurs on the right side of the heart, it results in swelling in the feet and ankles. Why might this happen?
It may have an impact on the inferior vena cava, which sends blood to the bottom half of the body, which includes the feet and ankles.

If the valve disease occurs on the left side of the heart, what complications would you expect to see?
Blood flow between the lungs and the left atrium could be altered. The flow of oxygenated blood to the rest of the heart would be interrupted, and that could result in lack of muscle response in certain areas.

Picture: Left Ventricle

Describe how the left and right sides of the heart differ from each other.
The left side of the heart is in charge of oxygenated blood, while the right side takes care of the oxygen poor blood. 

Picture: Interior of cross section

Unit 3 Reflection

This unit was all about the cardiovascular system, which involves the numerous information regarding the heart and the blood vessels which essentially give us life. In the beginning, we learned about blood pressure and heart rate, while learning the inside of the heart muscle. We also learned where blood went to and from the heart and the rest of the body. Atherosclerosis and aneurysms are examples of unhealthy blood vessels primarily based on the diet of the individual. Less unsaturated fats, less overcarbsumption, less sodium, and more exercise are difficult but healthy options to maintain a healthy cardiovascular system. I was really fascinated and frankly scared about the risks of heart disease and type 2 diabetes, and the causes seemed so difficult to avoid. I have maintained my stress levels, but my sleeping habits are difficult to amend as college apps and numerous homework assignments, tests, and other activities take up the majority of my time awake during the day. I have been eating less, as I recognized that my old habits of diet were excessive in calories and carbs. Snacks for me are mostly fruits now. My cortisol levels may be unhealthy because of my sleep debt, but I will hopefully be able to shake off my workload soon to sleep more. This unit has taught me a lot about arteries and veins, and although I seemed to have grasped their concepts, I think, if I remember correctly, I had difficulty with different functions of specifics like the separation of oxygen rich and oxygen poor blood. I probably need to test myself more, as my studying habits occasionally drift to just going over notes. Self testing is really important, as I remember from one of the do-nows in, I believe, this unit. I will do more of it to score higher on tests and overall retain all the information, as it is actually invaluable knowledge that directly applies to me and my lifestyle. I can become a healthier person and help others to become healthier with this wisdom of cardiovascular health. Type 2 diabetes and obesity are real problems these days, and I want to make an impact on this common unhealthy occurrence.