Question

Which feature of alveoli decreases the distance over which oxygen and carbon dioxide molecules diffuse?
A.Each alveolus has a large blood supply.
B.Each alveolus is only 0.1-0.2 mm in diameter.
C.There are approximately 150 million alveoli in each lung.
D.The walls of the alveoli are only one cell thick.

Answer 1

Answer:

idk ....................