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This detailed slide explains the blood flow of the heart, starting in the right ventricle up to the pulmonary valve, then to the lungs for oxygenation. Oxygenated blood returns through pulmonary veins to the left side of the heart, circulating through the body. Deoxygenated blood returns through vena cava to the right side of the heart, back to the lungs. Understanding this flow and heart anatomy is crucial for studying blood circulation. Although this slide looks a bit more complicated, it is much more descriptive in terms of showing you the blood flow of the heart. If you look at the right ventricle, you can see that the blood flows from the right ventricle up into the pulmonary valve. It then splits into the left and right pulmonary arteries, sending blood to both sides of the lungs to get oxygenated through the alveoli, so it picks up that oxygen that you breathe in, and then the blood comes back from the lungs through the left and right pulmonary veins. The left and right pulmonary veins are the only veins in the body that contain oxygenated blood. That's because it just left the lungs. Now it goes back to the left side of the heart, so entering through the left atrium, and goes down through the mitral valve into the left ventricle, and then out the left ventricle through the aortic valve into the aorta to be supplied to the body. Once the body uses up that oxygen and nutrients that was supplied to it, it sends the blood back to the heart through the inferior and superior vena cava. So those are the largest, the vena cava is the largest vein in the body, and it sends the blood back to the heart through the right atrium to again be circulated down through the tricuspid valve into the right ventricle, again to go back to the lungs. This is a very important slide for you to study because it's really important to know the flow of blood and what is, you know, the anatomical structures of the heart, the arteries, the valves, just the flow of blood overall, where it's deoxygenated, where it's oxygenated.