Question

what is simple startified epithelium? where do we find these tissues?​

Answer 1

Answer:

The simplest classification of these tissues is based on the number of cell layers. When the epithelium is composed of a single layer of cells, it is called simple epithelial tissue and those containing two or more layers of cells are called stratified epithelial tissues.

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Answer 2

Stratified epithelia consist of more than one layer of cells and only one layer is in direct contact with the basement membrane. Similarly, only one layer of cells has the apical surface exposed to the lumen of the organ or to the external environment. These tissues often have a protective role, and the extent of friction or abrasion often determines the number of layers of cells.

Stratified squamous epithelia are found in skin, with many dead, keratinized cells providing protection against water and nutrient loss. Stratified cuboidal epithelia are found surrounding the ducts of many glands, including mammary glands in the breast and salivary glands in the mouth. Stratified columnar epithelia are rare, found predominantly in some organs of the reproductive system, and in the conjunctiva of the eye. Transitional epithelia are a special subset of stratified epithelia that consist of ovoid cells that can stretch based on the pressure of liquids inside the organ. They are exclusively found in the excretory system.