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.

Column-$I$	Column-$II$
$a$. Larynx	$p$. Epiglottis
$b$. Trachea	$q$. Alveoli
$c$. Alveolus	$r$. Sound box
$d$. Epiglottis	$s$. Air passage tube
	$t$. Common passage

What is the approximate number of alveoli in human lungs?

Similar Questions

Air is breathed through which of the following pathways?

Match the following columns:
Column-$I$ Column-$II$
$a$. Larynx $p$. Epiglottis
$b$. Trachea $q$. Alveoli
$c$. Alveolus $r$. Sound box
$d$. Epiglottis $s$. Air passage tube
$t$. Common passage

Alveolus of lungs is lined by . . . . . . .

The laryngopharynx opens into

The roof of the nasal cavity is formed by which bone?

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