The diffusion membrane is made up of which layers?

  • A
    Squamous epithelium of alveoli,endothelium of alveolar capillaries,and basement membrane.
  • B
    Columnar epithelium of alveoli,endothelium of alveolar capillaries,and basement membrane.
  • C
    Squamous epithelium of alveoli,mesothelium of alveolar capillaries,and basement membrane.
  • D
    Cuboidal epithelium of alveoli,endothelium of alveolar capillaries,and basement membrane.

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