Why do the walls of the capillaries and air sacs have to be thin

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asked Jun 13, 2022 170k views

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Ryanbraganza · Answer 1 · 2022-06-19T11:24:06+0000

The alveoli are lined with mucus and are surrounded by a network of blood capillaries. They have very thin walls for gases to be absorbed through.Carbon dioxide diffuses from the blood into the alveoli.

Why do the walls of the capillaries and air sacs have to be thin

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