Question

……………………………………………. form the respiratory surface where gaseous exchange occurs. This process of gaseous exchange is called as ……………………………………

Answer 1

Answer:

Gas exchange occurs in microscopic dead-end air-filled sacs called alveoli, where a very thin membrane (called the blood-air barrier) separates the blood in the alveolar capillaries (in the walls of the alveoli) from the alveolar air in the sacs.

Answer 2

Answer:

Gases means it has freely particles any like gases oxygen in present of atmosphere