Plzz can anyone explain the four types of epithelial tissue. No spam plzz gud answer will mark as brainliest wrong answer reported
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Explanation: Types of epithelial tissues:
Various types of epithelial tissues are:
(a) Simple squamous epithelium: In cells lining blood vessels or lung alveoli, where transportation of substances occurs through a selectively permeable surface, there is a simple flat and extremely thin kind of epithelium which is named as simple squamous epitheliun.
It is found in the lining of the mouth, oesophagus, lung, alveoli, etc.
(b) Stratified Squamous Epithelium: The skin, which protects the body, is also made of squamous epithelium.
Skin epilhelial cells are arranged in many layers to prevent wear and tear. Since they are arranged in a pattern of layers, the epitheliunim is called stratified squamous epithelium.
(c) Cuboidal epithelium: This is cuboidal in shape and forms the lining of kidney tubules and ducts of salivaiy glands.
In some cases a portion of the epithelial tissue folds inward to form a multicellular gland. This is called glandular epithelium.
It performs a function of secretion and absorption.
(d) Columnar Epithelium: Where absorption and secretion occur, as in the inner lining of the intestine, tall epithelial cells are present and are named as cohunnar epithelium.
In the respiratory tract, on the outer surfaces of epithelial cells there are hair like projevtions called cilia. These cilia can move, and their movement pushes the mucus forward to clear it. This type of epithelium is named as ciliated columnar epithelium.