Question

3. Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. why?​

Answer 1

Answer:

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.

Answer 2

$\huge\underline\mathbb\purple{{♡ANSWER♡}}$

$\red\longmapsto\:$ Alveoli are made up of single cell layered epithelium which is provided with blood capillaries.so it is the respiratory area part where diffusion takes place.

$\red\longmapsto\:$ where as the trachea, bronchi and broncioles have multilayered walls without capillary network.So these tubes are only air conducting parts where diffusion does not occur.

$\large\underline\mathbb\green{{Hope\:This\:Will\:Help\:You}}$