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what is the circulatory system made of

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The circulatory system is made up of the heart, blood, and blood vessels. The heart pumps blood throughout your body. Blood carries oxygen, nutrients, water and waste to their proper places. Blood vessels, which include arteries, veins and capillaries, are hollow tubes that hold the blood as it travels throughout your body.

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The circulatory system is the heart which pumps the blood and the veins and arteries that disperse it to the body. Blood and the circulatory system are responsible for keeping nutrients and oxygen through the body to keep us healthy.

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