Biology
NULL
Medium
Question
The number of alveoli in human lungs is estimated to be around:_________?
A
150 millions
B
500 millions
✓ Official correct answer
C
800 millions
D
1 billion
Community credibility
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A
150 millions
No member explanations yet for this option.
B
500 millions
No member explanations yet for this option.
C
800 millions
No member explanations yet for this option.
D
1 billion
No member explanations yet for this option.
Explanation
The human lungs are estimated to contain around 500 million alveoli, the tiny air sacs responsible for gas exchange.