Search Results for: Spent primary cells
as simple epithelium, either squamous, columnar, or cuboidal, or in layers of two or more cells deep as stratified (layered), either squamous, columnar or cuboidal. in some tissues, a layer of columnar cells may appear to be stratified due to the placement of the nuclei. this sort of tissue is called
pseudostratified. all glands are made up of epithelial cells. functions of epithelial cells include secretion , selective absorption , protection, transcellular transport , and sensing . epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the...
https://en.wikipedia.org/wiki/Epithelium