Epithelium Multilayered Flat

Epithelium stratified (E) is a type of epithelial tissue that covers the surface of the body and internal organs. It consists of many layers of cells that form a protective barrier and participate in various body functions.

One type of epithelium is multilayered squamous epithelium (E. multistratificatum planum). This type of epithelium is found on the surface of the skin, intestinal mucosa, bladder, uterus and other organs.

Stratified squamous epithelium consists of several layers of cells. The outermost layer is called the basal layer, which consists of flat cells with cilia. These cells ensure the movement of the epithelium and protect it from external damage.

Below the basal layer is an intermediate layer consisting of columnar cells. These cells have longer and narrower nuclei than basal cells and can perform various functions, such as mucus secretion, protection against bacteria and viruses, and participation in epithelial regeneration.

The next layer is called the superficial layer, which contains many cells with large nuclei. This layer serves as protection against external irritants and is involved in the exchange of substances between the epithelium and the environment.

Depending on the type of organ, stratified squamous epithelium can have different functions. For example, on the skin it protects the body from external influences such as bacteria, viruses, chemicals, etc. On the intestinal mucosa, it is involved in the digestion of food and protects against damage. On the surface of the bladder, it allows urine to pass out and protects against infections.

In addition, stratified squamous epithelium is involved in the regeneration process. When the cells of this epithelium are damaged or die, new cells from the basal layer are formed in their place. This allows the epithelium to maintain its integrity and function for a long time.

Thus, stratified squamous epithelium plays an important role in protecting the body and maintaining its functions. It is found on many organs and surfaces of the body, and its structure and function may vary depending on its location.

Epithelial tissue (layer of cells) covers all internal and external organs (stomach, esophagus, intestines, skin). Due to this arrangement of the epithelium, the physiological interaction of mucosal cells with surrounding tissues is ensured. An important feature of this tissue is the presence of glands in it that secrete secretions - substances necessary to ensure the functioning of organs. Therefore, epithelial tissue is divided into two groups: single-layer and multilayer, but the defining difference between them is the number of layers (leaves) in a layer of cells.

Thus, the intestinal epithelium forms single-layer gelatinous tissues (for example, in the intestinal crypts or in the walls of the arterial vessels of the stomach). In mucous membranes