Multiple choice

How many alveoli are present in the lungs of an adult human being?

  1. Approx. 25 million/lung

  2. Approx. 300 million/lung

  3. Approx. 3000 million/lung

  4. 2

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In both the lungs of an adult, there are about 300 million alveoli.