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The most prevalent of the stratified epithelia is the squamous variety. As a keratinized or waterproofed component of the skin, stratified squamous epithelium provides substantial protection against friction, microbial invasion and dessication.Keratinized stratified squamous epithelium is identified by the multiple layers of dead cells at the surface.s a keratinized or waterproofed component of the skin, stratified squamous epithelium provides substantial protection against friction, microbial invasion and dessication. Keratinized stratified squamous epithelium is identified by the multiple layers of dead cells at the surface.
1 Stratified signifies two or more layers of epithelial cells. 2  By convention, a stratified epithelium is described according to the shape of cells on its free surface. 3  Regardless of whether the surface cells are squamous, cuboidal, or columnar, the underlying cells are usually cuboidal.imple squamous epithelium may be located at sites of rapid diffusion, such as the lining of lung alveoli, the lining of blood vessels (called endothelium), and at sites where very little activity is occuring, such as Bowman's capsule in the kidney and the lining of major body cavities (called mesothelium).