Answer:
some epithelial cels cover the body for
functions:
- secretion - selective absorbtion - protection - transcellular transport
and - sensing They cover the outside of the body and lines organ, (blood vessels and lymph) andcvities.
Epithelial cells form the thin layer of cells known as the endotheliu which is contiguous with the inner tissue lining of organs such as the -brain
- lungs
- skin
Explanation: EDpithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue through the basement membrane.