Whole detail about epithelial tissue
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Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands. Opposite the free surface, the cells are attached to underlying connective tissue by a non-cellular basement membrane. ...
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EPITHELIAL TISSUES
Epithelia cover the body surface, line body cavities and hollow organs, and form glands. Epithelial tissue forms a barrier between the body and the external environment and plays important roles in protection, filtration, absorption, excretion, and sensation.
They perform a variety of functions that include protection, secretion, absorption, excretion, filtration, diffusion, and sensory reception.
Characteristics :-
1 Cellularity. Epithelia are composed almost entirely of cells.
2 Specialized contacts. Adjacent epithelial cells are directly joined at many points by special cell junctions.
3 Polarity.
4 Support by connective tissue.
5 Avascular but innervated.
6 Regeneration.
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