Question

which of these are air sacs in the lungs​

Answer 1

Answer:

These air sacs, called alveoli, are responsible for gas exchange. They look a bit like grapes at the end of the bronchial branches. Healthy lungs have about 300 million air sacs in them. Each air sac is surrounded by a network of fine blood vessels (capillaries).

Answer 2

Explanation:

alveloi is the air sacs of lungs