theeboynextdoor theeboynextdoor

02-03-2021
Biology

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

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j0celyn713 j0celyn713

02-03-2021

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.

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