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Which are the three main layers that form the diffusion membrane?A. Thin squamous epithelium of alveoli, basement membrane of bronchioles anf basement substanceB. Thin squamous epithelium of alveoli endothelium of alveolar capillaries and the basement substanceC. Basement substance, cuboidal epithelium of alveoli and stratified epithelium of bronchioleD. Ciliated epithelium of trachea, endothelium of capillaries and basement substance |
Answer» Correct Answer - A | |