Which of the following is a special characteristic of the respiratory membrane structure that facilitates gas diffusion?
A. the merging of the basement membranes of the alveoli and capillary
B. the presence of alveolar pores
C. the presence of surfactant
D. the presence of type I and type II alveolar cells
Ans: A. the merging of the basement membranes of the alveoli and capillary
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