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प्रश्न
Give structure, types and functions in brief of the following:
Epithelial tissue
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उत्तर
Epithelial tissue:
Structure: The cells of epithelium are compactly placed, tightly held together and form a continuous sheet. Epithelial cells are supported below on a basement membrane. These cells may be of different shapes and sizes.
Types:
There are two main types of epithelial tissues which are:
(a) Simple and
(b) Compound
Functions:
(i) It forms a protective layer over the body and protects the underlying cells from drying up, injury, germs and harmful chemicals.
(ii) It absorbs water and other nutrients inside the body.
(iii) Some of these cells secrete ear wax, mucus, milk and digestive juices.
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संबंधित प्रश्न
Name the tissues found:
in the testes and ovaries.
Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.
Nerve cell does not contain
Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.
In a certain type of cell division, the diploid number of chromosomes is reduced to half. This kind of division occurs in ______.
The ______ epithelium is also known as the pavement membrane.
Glandular epithelium gives a stratified appearance.
Assertion: Materials are exchanged between epithelial and connective tissues by diffusion.
Reason: Blood vessels are absent in epithelial tissue.
Which one of the following types of cell is involved in making of the inner walls of blood vessels?
Stratified epithelial cells have limited role in secretion. Justify their role in our skin.
