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 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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