Question

define the structure of the diffusion membrane of alveoli​

Answer 1

Each alveolar membrane is one cell thick and is in direct contact with capillaries that are also one cell thick. ... This slows down the blood cells, so that gases have more time to diffuse through the capillaries. It also forces the red blood cells close to the walls of the capillaries, decreasing the diffusion distance.

Answer 2

Answer:

4 layers 2 of blood vells and 2 of alveoli all are thin for excange of gases