Exchange of gases in lungs is by

Exchange of gases in lung alveoli occurs through

Exchange of gases in lung alveoli occurs through:

Which of the following structures increase the total surface area for the exchange of gases in the lungs ?

Discuss the exchange of gases in plants.

Exchange of gases at lung alveoli occurs by ………………while intaking of glucose by a cell occurs by……………….

How is it that exchange of gases in the avian lungs occurs both during inspiration and expiration ?