| http://www.w3.org/ns/prov#value | - Paradoxically, they do not divide often and are stored throughout the body in tiny niches next to specialized cells, called nurse cells, that provide the growth factors and other chemical signals that allow stem cells to keep us alive.Stem cells are capable of self-renewal, which means that when they divide, they give rise to themselves, kind of like weeds, said Douglas Melton, chairman of Harva
|
