Question

diffusion of gases occurs in the alveolar region only and not in the other parts of the respiratory system why​

Answer 1

$\huge\textbf{\underline{Answer }}$

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

==>Because the alveolar sacs are rich in blood capillaries which make the diffusion of gases easy.

Answer 2

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. ... The exchange of O2 and CO2 takes place between the blood capillaries surrounding the alveoli and the gases present in the alveoli. Thus, the alveoli are the sites for gaseous exchange.

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