Which part of the skin is responsible for the growth of new cells?

The stratum germinativum, also known as the basal layer, is the deepest layer of the epidermis and plays a crucial role in the growth of new skin cells. This layer is composed of actively dividing keratinocytes, which are the cells responsible for the production of keratin, a key structural protein in the skin. As new cells are generated in the stratum germinativum, they push older cells upward through the layers of the epidermis, leading to the natural exfoliation of dead skin cells at the surface.

This continuous process of cell division and maturation is essential for maintaining the integrity and health of the skin. Unlike the stratum corneum, stratum lucidum, and stratum granulosum, which all consist of layers of cells that are more involved in protective functions and not in the active generation of new cells, the stratum germinativum serves as the foundation for skin regeneration. This makes it the key area for cell growth in the skin.