Question

State one feature of alveoli that adapts them to gas exchange

Answer 1

Heyaa☺
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One feature of alveoli that adapts them to gas exchange is

▶A lot of tiny blood vessels called capillaries.

▶Gives lungs to large surface area.

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Answer 2

The alveoli are adapted to make gas exchange in lungs happen easily and efficiently. Here are some features of the alveoli that allow this:

they give the lungs a really big surface area
they have moist, thin walls (just one cell thick)
they have a lot of tiny blood vessels called capillaries
The gases move by diffusion from where they have a high concentration to where they have a low concentration:

oxygen diffuses from the air in the alveoli into the blood
carbon dioxide diffuses from the blood into the air in the alveoli


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