Question

What is alveoli?
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Answer 1

Alveoli.

Alveoli are the functional unit of kidney. These

provide surface area for gaseous exchange in

humans.

Answer 2

Answer:

Alveoli are the tiny air sacs (only 1 cell thick) in the lungs at the end of the smallest airways, where the exchange of oxygen and carbon dioxide takes place. The average human has nearly 300 million alveoli to absorb oxygen from the air.