Which layer of the epidermis is responsible for cell division?

The layer of the epidermis responsible for cell division is the stratum basale. This is the deepest layer of the epidermis and contains a single row of columnar or cuboidal keratinocyte cells that are actively dividing. As these cells divide, they push older cells toward the surface of the skin, leading to the formation of new layers as cells migrate outward. This continuous process contributes to the maintenance and renewal of the epidermal layer.

The importance of the stratum basale cannot be overstated, as it plays a crucial role in skin health and repair. The cells produced in this layer also contribute to the overall thickness of the epidermis and help in the formation of the protective outer layers.