____ are the small sacs that are the site of gas exchange in the lungs

Question

asked Jan 22, 2021 184k views

1 Answer

StationaryTraveller · Answer 1 · 2021-01-27T05:02:07+0000

Answer:

alveoli

Step-by-step explanation:

They are the smallest structures in our lungs where capillaries exchange O2 and CO2 in blood.