Number of alveoli in the two human lungs is?

600 - 800

million

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200 - 300

million

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1 - 2

million

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100, 000 - 150, 000

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Solution

The correct option is A $600 - 800$ million
Alveoli are the basic unit of ventilation. The number of alveoli is a key structural determinant of lung architecture. Alveolar number is closely related to total lung volume, with larger lungs having considerably more alveoli, ranging from 600-800 million.
So, the correct option is '600-800 million'.

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