What is the approximate number of alveoli in | vedclass

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Question

(C) The human respiratory system includes a pair of lungs. Inside the lungs,the bronchioles terminate into thin-walled,vascularized bag-like structure

Vedclass · Accepted Answer

$300-400$ million

Vedclass · Answer

(C) The human respiratory system includes a pair of lungs. Inside the lungs,the bronchioles terminate into thin-walled,vascularized bag-like structures called alveoli. These alveoli are the primary sites for the exchange of gases ($O_2$ and $CO_2$). In a healthy adult human,the total number of alveoli in both lungs is estimated to be approximately $300$ to $400$ million. Therefore,option $C$ is the correct answer.

What is the approximate number of alveoli in human lungs?

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