The alveolar exchange surfaces of the lungs are approximately
A) 75 square kilometers.
B) 140 square meters.
C) 1400 square centimeters.
D) 7 square kilometers.
E) 14 square meters.

Question

Quizplus · Accepted Answer

The alveolar exchange surfaces of the lungs have a total surface area of approximately 140 square meters, which is equivalent to the size of a tennis court. This large surface area allows for efficient gas exchange between the air in the lungs and the blood vessels that surround the alveoli.

The Alveolar Exchange Surfaces of the Lungs Are Approximately