Question

What are epithelial tissue? Where the found in our body. Name it's types

Answer 1

Answer:

epithelial tissue is the simplest tissue, it is the protective tissue of animal body .these are found in the skin and linning of blood vessela,alveoli of lungs . these are of 5 types: (a) squamous epithelium (b) cuboidal epithelium (c) columnar epithelium (d) glandular epithelium (e) ciliated epithelium

Explanation:

Answer 2

$\sf{\huge{\underline{\underline{\blue{\mathsf{Animal \: Tissue }}}}}}$

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The main kind of animal tissues are as follow

• Epithelial tissue
• Connective tissue
• Muscle tissue
• Neural tissue

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Here , we will only elaborate epithelial tissue

$\sf{\huge{\underline{\blue{\mathbb{ Epithelial \: Tissue }}}}}$

• Epithelial tissue is a thin protective sheet of cells .

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$\sf{\blue{Location}}$ - It covers the surface of the body and lines the various body cavities and internal organs , including the blood vessel . Example :- The outermost layer of skin and the lining surfaces of the mouth , nose , lungs , stomach etc .

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$\sf{\blue{Shape}}$ - Epithelial cells may be flat , cuboidal or columnar in shape.

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$\sf{\blue{Function}}$ - The epithelial tissue functions for protection ( as on skin ) , absorption , secretion ( as in intestine ) , sensory perception , etc . Its four structurally distinct categories are as follow :-

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$\sf{\red{\underline{Squamous \: epithelium }}}$ is composed of cells , which is thin , flat with prominent nuclei closely packed . Example :- found lining the mouth and nasal cavities , blood vessels amd lymph vessels .

The squamous epithelium protects the underlying parts from mechanical injury , germs , harmful chemical and drying up .

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$\sf{\red{\underline{Stratified \: epithelium }}}$ : Found in the skin and the cornea . It is composed of several layers ( strata ) of the same or different kinds of epithelial tissue .

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$\sf{\red{\underline{Columnar \: epithelium }}}$ - contains vertically arranged cylindrical or brick lile cells . These cells are usually tall in size . columnar epithelium is generally found in the inner linings of the stomach and intestines .

• Ciliated columnar epithelium : At some places in the body , such as in the lining of the trachea ( wind pipe ) , the columnar epithelium have thread like protoplasmic projections called cilia , at there free ends. The cilia constantly keep lashing and move the material which enter these regions .

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• Glandular epithelium : ( also a kind of columnar epithelium ) contains some large cells which secret certain chemical substances . Such cells are common in the lining of the stomach and the intestine . At certain places in the body the glandular epithelium is folded inward to form compact , hollow or tubular glands , for example :- the sweat glands , tear glands or the liver .