Question

Give reasons :
a) Alveoli of lungs are lined by thin squamous epithelium​

Answer 1

Answer:

Explanation:

Alveoli are the site of gas exchange in the lungs. Because rapid diffusion of gases is necessary between the capillaries and the alveoli, a very thin epithelial layer is needed. As a result, alveoli use simple squamous epithelium so that gases can easily diffuses to and from the bloodstream.

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Answer 2

Answer:

Alveoli in lungs are the sites of exchange of gases (O² and CO²) for respiration. Hence, they are lined with thin squamous epithelium, which allows diffusion of gases. Skin is the outermost and protective covering of the body. It has stratified compound epithelium at it has high chances of wear and tear.