Q8 of 38 Page 45

How are alveoli designed to maximize the exchange of gases? (AS1)

1. In the lungs of humans, millions of alveoli are present where gaseous exchange occurs.

2. Each alveolus (plural alveoli) is made from single squamous epithelial cells which provides a very large surface area for the exchange of gases.


3. Availability of large surface area maximizes the exchange of gases.


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