The exchange of gases in the alveoli of the lungs takes place by

Exchange of gases in lung alveoli occurs through

Exchange of gases in lung alveoli occurs through:

How do exchanges of gases take place in the lungs.

Exchange of gases takes place in the

Exchange of gases in lungs is by

How does the total surface area through which the exchange of gases can take place in the lungs become large?What is its advantage?

The exchange of gases in old stems takes place from