What Is The Epithelium?
Answer:
The epithelium forms the outer layer of the human skin and covers external surfaces of the body and in dermatology, it is considered to be one of the four primary body tissues. Epithelium lines both the outside (skin) and the inside cavities and lumen of bodies. The outermost veil of our skin is composed of dead stratified squamous epithelial cells, as are the mucous membranes lining the inside of mouths and body cavity. Other epithelial cells line the insides of the lungs, the gastrointestinal tract, the reproductive and urinary tracts, and make up the exocrine and endocrine glands. Functions of epithelial cell include secretion, absorption, protection, transcellular transport, sensation detection, and selective permeability. Endothelium (the inner lining of blood vessels) is a specialized form of epithelium.
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