COMPOUND EPITHELIAL TISSUE
It is the type of epithelial tissue having more than one layer of epithelial cells various types of compound epithelial tissue are transitional stratified squamous cornified stratified squamous non cornified stratified columnar and stratified columnar ciliated
(A) transitional epithelium it consists of 3 or 4 layers cells it is known as transitional because the nature or cells is migrating from simple to stratified cells the upper layer of cells are large and flat the lower layer of cells are successively made up of pyriform and polyhedral cells this type of epithelium is found in the pelvis of the kidney ureters urinary bladder urethra etc
(B) stratified squamous cornified : this type of epithelium consists of many layer of squamous epithelial cells that are modified as the horny keratinized cells they are found in the skin nails palms etc the superficial cells are flat and horny and lower cells are broader and polyhedral they give protection against atmosphere mechanical pressure friction and injury
(c) stratified squamous non cornified :: this type of epithelium is similar to that of stratified squamous cornified epithelium except that it does not contain keratinized cells this type of epithelial tissue is found in various mucous membranes such as that of the mouth pharynx esophagus anal canal vagina cervix of the uterus etc
(d) stratified columnar:: this type of epithelial tissue is found in conjunctiva pharynx and anal mucosa etc it consists of many layers of columnar cells
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