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Grade 12Zoology

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

Profile image of SHADMAN ALI
8 Years agoGrade 12
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2 Answers

Profile image of Vasanth SR
8 Years ago
D
Profile image of Khushboo
7 Years ago
No.  Of alveoli per lung=400 million (per lung) 
Radius is 0.1mm
Alveoli for a pair of lung =800 million
Total respiratory surface is 800*4πR^2
By calculation u will get ans 
 

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