Question #913ad

1 Answer
Ujjwal
Jan 17, 2018

There are approximately 200-250 million alveoli in each lung of a 10 years old boy.

Explanation:

Number of alveoli depends on the volume of the lung.It varies with person to person.
The newborns have approximately 150 million alveoli whereas an adult has 400 million alveoli in each lung.

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