NEET BIOLOGY

Detailed explanation-1: -The simple epithelia (cells arranged in a single layer) promote the diffusion in tissues namely the regions of gas exchange in the lungs and the exchange of the wastes and nutrients at the blood capillaries. Renders a smooth, frictionless surface where secretion takes place.

Detailed explanation-2: -Simple squamous epithelial cells form a membrane that allows selective diffusion of materials to pass through. Diffusion helps with filtration, absorption and secretion functions.

Detailed explanation-3: -Simple squamous epithelial cells function as mediators of filtration and diffusion. Due to their simple and thin construct, they allow for easy transmembrane movement (i.e. across the membrane, and through the cell) of small molecules.

Detailed explanation-4: -Simple squamous epithelium This type of epithelia lines the inner surface of all blood vessels (endothelium), forms the wall of alveolar sacs in the lung and lines the body cavities (mesothelium). The primary function of simple squamous epithelia is to facilitate diffusion of gases and small molecules.

Detailed explanation-5: -Squamous epithelium has a thin layer of flattened cells with irregular boundaries. Thus it helps in diffusion.