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this image shows the inside of a human lung. there is a space between the alveolar sac and...
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this image shows the inside of a human lung. there is a space between the alveolar sac and the capillary where oxygen and carbon dioxide diffuse between the lung and blood. which structures form this blood-air barrier?
a. structures a and b
b. structures b and c
c. structures c and d
d. structures d and b
Answers: 2
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