write and explain the circulation of blood
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The blood circulatory system delivers nutrients and oxygen to all cells in the body .It consist of the heart and the blood vessels running through the entire body .The arteries carry blood away from the heart
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The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart
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