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A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to (A) 500 mm2 (B) 200 mm2 (C) 100 mm2 (D) 1000 mm2
D
No. Of alveoli per lung=400 million (per lung) Radius is 0.1mmAlveoli for a pair of lung =800 millionTotal respiratory surface is 800*4πR^2By calculation u will get ans
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