The functional unit of the lungs is:

Practice MCQ for SSC, UPSC, RRB Exams

A. Alveolus A.
B. Bronchus B.
C. Bronchiole C.
D. Trachea D.

Correct Answer: C সঠিক উত্তর: C

Explanation ব্যাখ্যা

Alveoli are tiny air sacs in the lungs where gas exchange occurs between oxygen and carbon dioxide. They are the primary site for this exchange, making them the functional unit of the lung.

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