Stem cells are self-renewing cells that have the potential to become multiple different cell types in the body. Stem cells are found in developing embryos. Adult stem cells maintain and repair tissues throughout life. Induced pluripotent stem cells are a type of stem cell derived from adult cells that are reprogrammed in the lab.
Embryos contain embryonic stem (ES) cells, undifferentiated cells that will form all cell types within the body. Stem cells in the adult are referred to as adult stem cells or somatic stem cells and in contrast to embryonic stem cells, these can form only a few different cell types. Induced pluripotent stem cellsInduced pluripotent stem cells (iPS cells) are generated in the laboratory. They are derived from adult cells which are treated with factors that reprogram the cell back to an undifferentiated state.