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 × 10 6 and that the average volume of a single alveclus is 4.2 × 10 6 μm 3 . (Recall the equation for the volume of a sphere, V = 4 3 πr 3 and the equation for the area of a sphere. A = 4 πr 2 .) 57. What is the total volume of the gas-exchanging region of the lungs? A. 2000 μm 3 B. 2m 3 C. 2.0 L D. 120 L
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 × 10 6 and that the average volume of a single alveclus is 4.2 × 10 6 μm 3 . (Recall the equation for the volume of a sphere, V = 4 3 πr 3 and the equation for the area of a sphere. A = 4 πr 2 .) 57. What is the total volume of the gas-exchanging region of the lungs? A. 2000 μm 3 B. 2m 3 C. 2.0 L D. 120 L
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 =
4
3
πr3 and the equation for the area of a sphere. A = 4 πr2.)
57. What is the total volume of the gas-exchanging region of the lungs?
Calculating lung volume in humans. In humans, oxygen and carbon
dioxide are exchanged in the blood within many small sacs called alveoli
in the lungs. Alveoli provide a large surface area for gas exchange. Recent
careful measurements show that the total number of alveoli in a typical
pair of lungs is about 480 x 10 6 and that the average volume of a single
alveolus is 4.2 x 10 6 cubic micrometer.
Grains of fine California beach sand are approximately spheres with an average radius of 50.0 μm and are made of silicon dioxide, which has a density of 2.80 × 103 kg/m3. What mass of sand grains would have a total surface area (the total area of all the individual spheres) equal to the surface area of a cube 1.10 m on an edge?
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