explain the process of circulation
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Explanation:
The word circulation refers to the movement of blood through your body's blood vessels and heart. It can also mean free movement in a more general sense, as in the circulation of news, money, or even library books. Circulation of blood is what happens in your body's circulatory system.
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The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. ... Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand.
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