What Is the Epidermis?

The skin is divided into epidermis and dermis. The epidermis is the superficial structure of the skin and is composed of stratified flat epithelium. From the basal layer to the surface can be divided into five layers, namely the basal layer, spinous layer, granular layer, transparent layer and cuticle.

As the largest organ of mammals, the skin is a mechanical barrier between the body and the outside world. It has a complex tissue structure and multiple physiological functions. The skin is divided into two layers, the epidermis and the dermis. The epidermis is located above the dermis and consists of a stratified flat epithelium, which is thin and contains no blood vessels. It can be divided into 5 layers from the basal layer to the surface, namely the basal layer, the spinous layer, the granular layer, the transparent layer and the cuticle ^[1]

Cuticle: Located in the shallowest layer of the epidermis, it consists of several layers to dozens of layers of flat, non-nucleated keratinocytes. The cytoplasm is filled with eosinophilic keratin, which has a strong resistance to acid, alkali, friction and other factors. The surface cells of the stratum corneum often fall off in small pieces, forming dander ^[1] .