Write a short note of epithelium
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The tissue consists of several layers of cells. The numbers of layers in the tissue are varied in different parts of the body. The basal layer rests on a basement membrane and continuously divides mitotically to produce a number of new cells.
There is a gradual change in the shape and form of the cells as they approach the superficial layers. The upper layers are composed of flat, plate like cells. The cells of the superficial layers are constantly removed and replaced by the fresh layers of cells produced from beneath. The cells of the surface layers are very thin and have flat nuclei.
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