Topics: Gaseous Exchange in Humans Quiz
Oxygen diffuses from
A. Trachea to lung
B. Alveolus to blood capillary
C. Blood capillary to alveolus
D. Lung to trachea
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Which of the following is not correct about alveolus?
A. Thick wall
B. Thin wall
C. Moist wall
D. Large surface area