In man total number of alveoli in both lungs are

Question

In man total number of alveoli in both lungs are (A) 3000 (B) 30,000 (C) 500,000,000 (D) none of the options is correct

Tardigrade Admin · Accepted Answer

None of the options is correct. The alveoli (made of simple squamous epithelial cells) are the final branching of the respiratory tree and act as the primary site for gas exchange. There are about 300 million in the two lungs and each alveolus has an average diameter of about 0.2 millimeter.

Q. In man total number of alveoli in both lungs are

3000

30,000

500,000,000

none of the options is correct

None of the options is correct. The alveoli (made of simple squamous epithelial cells) are the final branching of the respiratory tree and act as the primary site for gas exchange. There are about 300 million in the two lungs and each alveolus has an average diameter of about 0.2 millimeter.