Each alveolus is cup-shaped with very thin walls.
It’s surrounded by networks of blood vessels called capillaries that also have thin walls.
The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.
The carbon dioxide you breathe out is diffused from the capillaries to the alveoli, up the bronchial tree and out your mouth.
The alveoli are just one cell in thickness, which allows the gas exchange of respiration to take place rapidly.

3 0

1 year ago

Why is using staw for insulation good for the environment?

Advocard [28]

Answer:

staw or straw? But, never the less, normal insulation hurts the environment. while being manufactured, the factory's blow smoke. while straw/staw do not have to be built, so there for wont hurt the environment.

Explanation:

7 0

2 years ago

Read 2 more answers