what is epithelial tissue ? explain structure,location and functions
Answers
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What is epithelial tissue
A type of animal tissue made up of densely packed cells that rest on a basement membrane to act as a covering or lining of various bodily surfaces and cavities
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structure
Epithelial tissue is like the brand name Lego: Lego has differently sized and shaped blocks, and epithelial tissue has differently sized and shaped cells. Lego blocks can be arranged into differently shaped structures, and epithelial cells can be arranged into differently shaped structures as well.
Regardless of the shape, size, or arrangement of the cells, they are still a type of, or part of, epithelial tissue, just like all our differently sized, shaped, and arranged plastic bricks are still Legos.
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location
Epithelial tissue (epithelium) covers the entire outer surface of the human body and animals, lining the mucous membranes of the hollow internal organs (stomach, intestines, urinary tract, pleura, pericardium, peritoneum) and forms part of the glands of the internal secretion.
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functions
functions of epithelial tissues: (1) protection of the underlying tissues, (2) absorption, (3) secretion, and (4) reception of sensory stimuli.
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Structure - The cells of the epithelial tissue are flat, cubodial or elongated and lie close to each other without any intercellular space.
Location- The epithelial tissue makes up the lining of various organs such as the stomach, intestines and trachea . It is present in the skin and provides a protective covering for the entire body.
Functions - Epithelial Tissue covers the body surface or lines the body cavity. Therefore its main role is to
- protect the underlying tissues
- prevent the entry of germs
- secrete mucus
- help in absorption of digested food in the intestines
- help in exchange of gases between the alveoli of lungs and the surrounding blood capillaries
- grow rapidly to repair damage , if any, in the body.