Calculating Lung Volume in Humans. In human lungs, oxygen and carbon dioxide are exchanged in the blood within many small sacs called alveoli. Alveoli provide a large surface area for gas exchange. Recent careful measurements show that the total number of alveoli in a typical human lung pair is about 480 × 106 and that the average volume of a single alveclus is 4.2 × 106 μm3. (Recall the equation for the volume of a sphere, V =
57. What is the total volume of the gas-exchanging region of the lungs?
- A. 2000 μm3
- B. 2m3
- C. 2.0 L
- D. 120 L
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