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Home » 2016 » June » 17

Blood does a body good

Each time a human heart beats, blood rushes out of the muscular pump and winds through 60,000 miles of blood vessels. That network of tubes connects every cell of the body, each of them dependent on blood. This vital fluid delivers essential nutrients, carts away waste products, fights infection and heals wounds.

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Views: 321 | Added by: scienceclub | Date: 17-Jun-2016 | Comments (0)

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