Hematopoietic stem cells are transplanted into a person with cancer to help replenish bone marrow.
It was soon after discovered that many of these cells were circulating freely in the bloodstream.
Hematopoietic stem cells are the most widely known example.
Luismmolina / E+ / Getty Images
Embryonic stem cells were first grown in a laboratory in 1998 for reproductive purposes.
iPSCs usually start out as skin or blood cells which then undergo genetic programming.
Cleveland Clinic.Stem cell transplant (bone marrow transplant).
National Institutes of Health.Stem cell basics.
Simara P, Motl JA, Kaufman DS.Pluripotent stem cells and gene therapy.Transl Res.
2013;58(5):11761184. doi:10.1007/s10620-013-2620-2
