Which structures are included in the respiratory membrane? A. alveolar fl uid and surfactant B. alveolar fl uid, surfactant and epithelial cells of alveoli C. alveolar fl uid, surfactant, epithelial cells of alveoli and basement membrane of epithelial cell D. alveolar fl uid, surfactant, epithelial cells of alveoli, basement membrane of epithelial cell and endothelial cell of capillary
Option D. Alveolar fl uid, surfactant, epithelial cells of alveoli, basement membrane of epithelial cell and endothelial cell of capillary are included in the respiratory membrane.
