part of part of eukaryotic cell somatic stem cell stem cell of epidermis A somatic stem cell that is part of the epidermis. The epidermal stem cell, a critical component of the skin's structure, is essential for maintaining, repairing, and renewing the epidermal layer. Undifferentiated and capable of becoming various cell types within the epidermis, these cells typically remain quiescent, preserving the skin's longevity and regenerative ability. The primary role of these stem cells is to replenish the population of keratinocytes, the key protective cells in the epidermis. When stimulated by signals like injury or normal wear, these stem cells activate, divide, and give rise to both new stem cells and differentiated cells. The latter form layers of stratified keratinocytes that make up the skin's protective barrier. Beyond skin-related applications, the regenerative potential of epidermal stem cells has garnered interest in medical and cosmetic fields, particularly for treating burns, chronic wounds, and aging skin. Notably, these cells, specialized for skin tissue, might, under controlled conditions, have the potential to form diverse tissues, expanding possibilities in regenerative medicine. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) FMA:70541 https://cellxgene.cziscience.com/cellguide/CL_1000428 epidermal stem cell ZFA:0007122 skin epidermis