Epithelial tissue is tissue which covers the body of the surface of lines of the body cavity, forms part of the most glands. It’s a cover outer surface of the body as well as the inner surface of cavities in many internal organs of the body.
Its function is to protect, support, absorb, filter, form slippery surface.
There are three shapes of epithelial cells.
Cells are a flat and scale-like structure which is wider than their height. It found in lining of esophagus, mouth, blood vessels and alveoli of lungs.
The columnar epithelium cells are a column in shape and it is taller than they are wide.
Cube shape cells having approximate same in size.
The epithelium is classed as simple squamous epithelium, stratified squamous epithelium, stratified cuboidal epithelium, stratified columnar epithelium.
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