Question

8. How are alveoli designed and why
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Answer 1

Explanation:

The alveoli are adapted to make gas exchange in lungs happen easily and efficiently. ... 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. Alveoli provide a surface for the exchange of gases.

Answer 2

Hope this will help you , buddy

thanks karo