Pls help I will give brainlist
2 answers:
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.
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hope this helps u if yes so please mark me as brainiest</em></u></h2>
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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