Question

The surface area exposed to the air within the human lungs is over ………………… square feet, more than 50 times the skin surface of the body.

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Answer 1

Answer:

Estimates of the total surface area of lungs vary from 50 to 75 square metres (540 to 810 sq ft); although this is often quoted in textbooks and the media being "the size of a tennis court", it is actually less than half the size of a singles court.

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Answer 2

Answer:

alveoli

Explanation: