with the hell of a diagram describe the flow of blood through the heart of human beings.
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I think this is what your asking, right
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The carbon dioxide rich blood has to rich the lung for the carbon dioxide to be removed. The oxygen rich blood is then pumped to the rest of the body. It comes from the lungs from the left atrium. It relaxes when it is collecting blood. It then contract when the left ventricle expands. So that blood is transported to it. When the muscular left ventricle contacts the blood is pumped out to the body.
Deoxygenated blood come from the body to the upper chamber on the right atrium. As the atrium contacts the right ventricle which in terms pump it to the lungs for oxygenation.
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