The respiratory membrane is composed of:

A. the alveolar sacs and pulmonary arteries.
B. the alveolar membrane, the capillary wall, and their fused basement membrane.
C. the fusion of the type I cells and type II cells in the lungs.
D. the cells found between the alveolar pores.


Answer: B. the alveolar membrane, the capillary wall, and their fused basement membrane.

Anatomy & Physiology

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