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Capillaries

Why are capillaries so thin?


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Wiki User
2012-10-30 14:23:11
2012-10-30 14:23:11

to let gas pass over them like oxygen and corbon dioxide

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so they can allow for gas exchange

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Capillaries are thin tubes connected to your veins and arteries that transfer the blood from the arteries to the veins. Capillaries are so thin, they are thinner than one piece of hair. They are one cell thick.

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Capillaries are one cell thin so that the red blood cells can easily exchange oxygen that they picked up in the lungs, with the bodies cells.

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so that oxygen can pass through easily

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so that gases can pass through them


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