stratified epithelium has many layers. The epithelium classified on basis of
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There are three principal shapes of epithelial cell: squaMOUS, ColuMnar, and cuboidal.
These can be arranged in a single layer of cells as siMple epitheliu M, either squGMOUS. coluMnar, Or cuboidal, or in layers of two or
More cells deep as stratified (layered). or
COMpoUnd, either squaMoUs, coluMnar or
Cuboidal. In some tissues, a layer of coluMnar cells MGy appear to be stratified due to the placement of the nuclei. This sort of tis sue is called pseudostratified. All glands are made up of epithelial cells. Functions of epithelial cells include secretion, selective cbsorption,
Protection, trans cellular trans port, and sensing.
Epithelial layers contain no blood vessels, so they MUSt receive nourishMent via diffusion of substances from the underlying connective tissue, through the basement MeMbrane. 2|13|
Cell junctions are well employed in epithelial tissues.