Squamous epithelium - Definition

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Squamous epithelium is a type of fundamental tissue of which the juxtaposed (or joint) cells are in a flattened and stratified shape. There are two distinct forms. The first is keratinized stratified squamous epithelium, generally located at the level of the epidermis. It has four cellular layers: basal, spined cell, granular, and corneal. The second type is non-keratinized squamous epithelium, which is found in the oral and vaginal cavities, the esophagus, the cornea, and the anal canal. It is also composed of four cellular layers.