What are the layers encountered by O_2 as it | vedclass

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(D) The diffusion membrane is composed of three major layers: $1$. The thin squamous epithelium of the alveoli. $2$. The endothelium of the alveolar c

Vedclass · Accepted Answer

Epithelium of alveoli $\rightarrow$ Basement membrane $\rightarrow$ Endothelium of capillaries

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(D) The diffusion membrane is composed of three major layers: $1$. The thin squamous epithelium of the alveoli. $2$. The endothelium of the alveolar capillaries. $3$. The basement substance (basement membrane) in between them. As $O_2$ moves from the alveoli into the blood,it first crosses the alveolar epithelium,then the basement membrane,and finally the capillary endothelium. Therefore,the correct sequence is: Epithelium of alveoli $\rightarrow$ Basement membrane $\rightarrow$ Endothelium of capillaries.

What are the layers encountered by $O_2$ as it passes through the diffusion membrane from the start to the end?

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