What are the three major layers involved in the diffusion membrane?

What are the three major layers involved in the diffusion membrane?
  1. Alveolar capillaries, basement substance, and alveolar epithelium
  2. Alveolar epithelium, basement substance, and alveolar capillaries
  3. Endothelium of alveolar capillaries, basement substance, and squamous epithelium
  4. Squamous epithelium, basement substance, and endothelium of alveolar capillaries

Solution

The diffusion membrane involved in the exchange of gases is made up of three major layers, namely the squamous epithelium of alveoli, the endothelium of alveolar capillaries, and the basement substance in between them.

Asked in: NCERT

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