Epitrichium, Periderm

Epitrichium and Periderm are two important layers of the skin that have their own unique functions and characteristics. Both of these layers are at the very top of the skin and provide its protection.

The epitrichium is a temporary layer of skin that is present only during the early stages of embryonic development. The thickness of the epitrichium is equal to the thickness of one cell and it protects the epidermis located underneath it until it is completely formed. As the epidermis forms, the epitrichium dies and sloughs off.

The periderm is a layer of skin that is formed in place of the epitrichium and serves the function of protecting the skin from external influences. It consists of three layers: proherm, primary periderm and secondary periderm. The progerm is formed in the early stages of embryonic development and then develops into the primary periderm. The primary periderm provides protection to the skin during the development of the epidermis and dermis. When the epidermis and dermis are fully formed, the primary periderm dies and is replaced by the secondary periderm. The secondary periderm provides protection to the skin from external influences such as injury, infection and adverse environmental conditions.

The periderm plays an important role in skin development and protection. It may also play a role in various skin diseases. For example, in some skin diseases, such as eczema, the periderm can be damaged, which can lead to disruption of its protective function and deterioration of the skin.

Thus, the epitrichium and periderm are important layers of the skin that provide its protection during different periods of embryonic development and adult life. Understanding their roles and functions can help in better understanding various skin diseases and their treatments.

Epitrichium and periderm: the outermost layers of skin

Epitrichium and Periderm are the two outermost layers of skin that protect the epidermis from damage. They are present only in the early stages of embryonic development, but play an important role in skin formation.

The epidermis is the outermost layer of the skin and has a protective function. The epidermis consists of several layers of cells: basal, spinous, granular, shiny and horny. Each layer has its own functions and structural features.

The uppermost layer of the epidermis is the Epitrichium. It is a thin layer of cells that protects the epidermis from external influences. The epitrichium has a thickness equal to the thickness of one cell. It is present only in the early stages of embryonic development and disappears after the epidermis is fully formed.

The periderm, in turn, is a layer of keratinized cells that form the protective layer of the skin. The periderm is present at all stages of epidermal development and protects it from mechanical damage. In addition, the periderm is involved in the regulation of body temperature and metabolism.

Thus, the Epitrichium and Periderm play an important role in protecting the epidermis and forming the skin. They are part of the body's overall defense system and protect the skin from external influences throughout life.

Epitrich is the superficial layer of the epidermis that protects the deeper layers of the skin from damage and infection. However, we usually do not notice this layer because it is thin and located under the top layer of skin - the epidermis.

The epitrichous consists of several layers of cells, but the most important are the keratinocyte layer (keratinocytes) and the intercellular granular degeneration (IGD) layer. Keratinocytes are located in the center of the layer, and IGDs are located on the surface.

In women epitrichus