The diffusion membrane of the lungs is made u | vedclass

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(B) The diffusion membrane of the lungs,which facilitates the exchange of gases ($O_2$ and $CO_2$),consists of three main layers: $1$. The thin squamo

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Squamous epithelium + Endothelium of blood vessel

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(B) The diffusion membrane of the lungs,which facilitates the exchange of gases ($O_2$ and $CO_2$),consists of three main 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. Therefore,the correct composition is the squamous epithelium of the alveoli and the endothelium of the blood capillaries.

Column-$I$	Column-$II$ (Amount of $CO_2$ in $mm \ Hg$)
$(a)$ Alveoli	$(1)$ $40$
$(b)$ Tissue	$(2)$ $45$
$(c)$ Blood without $O_2$ (Deoxygenated)	$(3)$ $40$
$(d)$ Blood with $O_2$ (Oxygenated)	$(4)$ $45$

The diffusion membrane of the lungs is made up of which of the following layers?

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Constant flow of $CO_2$ from the tissues into the blood is due to

The solubility of $CO_2$ is about $.......$ times higher than that of oxygen across the respiratory membrane.

Arrange the appropriate pair.
Column-$I$ Column-$II$ (Amount of $CO_2$ in $mm \ Hg$)
$(a)$ Alveoli $(1)$ $40$
$(b)$ Tissue $(2)$ $45$
$(c)$ Blood without $O_2$ (Deoxygenated) $(3)$ $40$
$(d)$ Blood with $O_2$ (Oxygenated) $(4)$ $45$

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