What is the thickness of the diffusion membra | vedclass

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(D) The diffusion membrane is composed of three major layers: the thin squamous epithelium of alveoli,the endothelium of alveolar capillaries,and the

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Much less than a millimeter

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(D) The diffusion membrane is composed of three major layers: the thin squamous epithelium of alveoli,the endothelium of alveolar capillaries,and the basement substance in between them.These layers are extremely thin,and the total thickness of the diffusion membrane is much less than a millimeter $(This minimal thickness is crucial for the efficient diffusion of gases ($O_2$ and $CO_2$) across the membrane.

What is the thickness of the diffusion membrane involved in the exchange of gases in the lungs?

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