Blood vessel

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A blood vessel is a channel in the body that transports blood. Blood vessels are divided into three categories: arteries, veins, and capillaries. Arteries, carry blood from the heart to the body. Veins transport blood back to the heart, and capillaries, exchange blood between the arteries and veins and provide a large space for oxygen, nutrients, and waste products to exchange between the body tissue and the blood.

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