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

Question : Diffustion of gases occurs in thealveolar region only and n

1.	Question : Diffustion of gases occurs in thealveolar region only and not in the other parts of respiratory system. Why?
Answer» Solution :Diffusion of gases occurs only in the alveoli as they are LINED by THIN, moist, vascular and permeable respiratory membrane which allows the pulmonary gas exchange between oxygen of alveolar air and `CO_(2)` of blood. Other PARTS of respiratory system are lined by THICK lining which which does not allow exchange of gases.