Question

4. List three features of alveoli which enable them to perform their function​

Answer 1

Answer:

carbon dioxide diffuses from the blood into the air in the alveoli.

...

Here are some features of the alveoli that allow this:

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.

Answer 2

Answer:

idk

Explanation: