81. Describe the flow of blood through the heart of human beings.
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Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve
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not from google
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no but I am going now
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so I meet you at tomorrow 8:30p.m.
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