Renewal of the epidermis relies on stem cells located in its lowest layer, which constantly produce new keratinocytes. These new cells are then pushed to the surface, differentiating along the way ...

Skin is used for gas exchange. Thick keratin layer would restrict oxygen exchange and water absorption. Amphibians have many mucus glands to reduce water loss. As a result of this skin, they are ...

The skin epidermis has become the paradigm for exploring how a stratified epithelium develops in the embryo and how, in the adult, it maintains an inner layer of proliferating cells that gives ...

The epidermis, the top layer of the skin, protects the body from external aggression. Renewal of the epidermis relies on stem cells located in its lowest layer, which constantly produce new ...