Adult stem cells are undifferentiated cells found throughout the body that divide to replenish dying cells and regenerate damaged tissues. An adult stem cell is an unspecialised cell that is capable of Long term renewal and Differentiation into specialised cell types. The primary function of adult (somatic) stem cells is to maintain tissue homeostasis by replenishing senescent or damaged cells. They are also known as somatic stem cells, they can be found in children, as well as adults.