what is called circulatory system
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The circulatory system, also called cardiovascular system, is a vital organ system that delivers essential substances to all cells for basic functions to occur.
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In the circulatory system, blood carries digested food, water and oxygen to all the parts of the body. It also takes away the waste products like carbon dioxide made in the body cells. The various organs of the circulatory system in humans are : Heart , blood and Blood vessels.
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