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In Good Shape

Blood vessels - an effective transport system for nutrients and waste products

If all a person's blood vessels - arteries, veins and capillaries - were laid end to end, they would be 100,000 kilometers long. Arteries bring oxygenated blood from the heart to the body's organs and tissues. Veins bring oxygen-depleted blood to the heart. The tiny capillaries link the arteries and veins.

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They are where the exchange of fluids, gases, waste and nutrients between the blood and the body's tissues takes place.