Diffusion of gases occurs in the alveolar region only, and not in the other parts of respiratory system.Why ?

Diffustion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

Diffusion of oxygen occurs in the alveolar region only and not in other parts of respiratory system. How do you justify the statement ?

why diffusion of air occurs only in alveolar region and not in other parts of respiratory system ?

Enlist the various parts of respiratory system.

Name two parts of respiratory system of man.