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GOT7SKZ

Answer:

* 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.

hope this helps u if yes so please mark me as brainiest

gadaa
They give lungs a big surface area

Moist, thin walls (one thick wall)

They have a lot of tiny blood vessels

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