Describe the structure and function of different types of epithelial tissues.

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Solution

TYPES OF TISSUES STRUCTURE FUNCTION EXAMPLE
Simple Squamous
It forms a single layer of flat cells which is in contact with the basal lamina. It helps in the filtration or diffusion of molecules. Lining of Bowman's capsule
Simple Cuboidal It forms a single thick layer and is made of cube-shaped cells. It helps in secretions. Lines the salivary glands
Simple Columnar It forms a uni-layered, elongated shaped cells. It helps in the secretion of digestive fluids and absorbs nutrients. Lining layer of intestinal mucosa
Pseudostratified It appears 2-3 layered (but in actual it is single layered). It helps in removing mucus. Lines the respiratory tracts
Stratified Squamous It consists of squamous (flattened) epithelial cells arranged in layers over a basal membrane. It forms a protective layer, block diffusion/microbes.
Epidermis of skin
Transitional The shape of the surface cells changes/ transition depending on the degree of stretch. It allows considerable stretching.
Lining of the urinary bladder

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