capable of stem cell somatic stem cell Somatic stem cells, also known as adult stem cells, are undifferentiated cells found throughout the body post-embryonic development. They reside in specialized niches within tissues such as the bone marrow, brain, muscles, skin, and liver. Fundamentally, these cells possess the ability to self-renew, maintaining their numbers, and to generate differentiated cells that replace dying cells and repair damaged tissues. The potency of somatic stem cells varies based on their tissue of origin. For instance, hematopoietic stem cells in the bone marrow exhibit multipotency, giving rise to all blood cell types. Conversely, muscle stem cells display unipotency, generating only muscle cells. Somatic stem cells respond to environmental signals that regulate their quiescence, activation, and differentiation states. In response to tissue injury, they proliferate and differentiate into specific mature cell types to replace lost or damaged cells. Intricate mechanisms ensure a delicate balance between self-renewal and differentiation, guiding tissue maintenance and repair without risking aberrant cell proliferation leading to tumor formation. (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.) CALOHA:TS-2086 https://cellxgene.cziscience.com/cellguide/CL_0000723 A stem cell that can give rise to cell types of the body other than those of the germ-line. ZFA:0009307 somatic stem cell MESH:D053687 somatic stem cell division