Q. Which is the structural and functional unit of respiratory system?

A
Alveoli
B
Lungs
C
Larnyx
D
Osephagus
Solution:

Alveoli is the structural and functional unit of lungs. The main function of the respiratory system is the exchange of oxygen from the atmosphere for carbon dioxide produced by the cells of the body. Other functions of the respiratory system include participation in the acid-base balance of the body, phonation, pulmonary defense, and metabolism.

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