Exchange of gases, food and other substances occurs between arteries and veins. how does this exchange happens?
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Blood moves very slowly through capillaries. As the blood moves through a capillary, nutrients, oxygen, and food leave the blood and enter the body cells. ... Capillaries are exchange vessels. Gases (oxygen and carbon dioxide), nutrients, and wastes pass in both directions across capillary walls
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I think due to capillaries
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