Adult stem cells

Adult stem cells, or somatic stem cells, are undifferentiated cells residing in specific tissue niches that maintain and repair the tissue throughout life. Examples include hematopoietic, mesenchymal, intestinal, and neural stem cells. They are typically multipotent, generating the cell types of their tissue of origin. Their decline with age underlies stem cell exhaustion, making their preservation and rejuvenation a primary goal of longevity and regenerative medicine.