an undifferentiated (unspecialized) cell that occurs in a differentiated (specialized) tissue, renews itself, and becomes specialized to yield all of the specialized cell types of the tissue from which it originated
a stem cell that gives rise to limited types of cells
Stem cells found in various tissues of an adult organism that remain in an undifferentiated, or unspecialized, state. Adult stem cells can renew themselves and (with certain limitations) differentiate to yield all the specialized cell types of the tissue from which it originated. For example, a heart stem cell can give rise to a heart muscle cell. Some scientists feel that adult stem cells may be able to give rise to a variety of different cell types, and ongoing research is exploring this issue. Currently, several limitations exist to using adult stem cells: Although many different kinds of multipotent adult stem cells have been identified, adult stem cells that could give rise to all cell and tissue types have not yet been found. They also may not have the ability to multiply like embryonic stem cells do. Adult stem cells can be difficult to isolate and purify because they are often present in minute quantities. Finally, during the course of their lifetime, adult stem cells may accumulate DNA abnormalities—caused by sunlight, toxins, and errors in making more DNA copies.
A cell taken from mature tissue that can renew itself but has a limited ability to transform into specialized cell types.
An undifferentiated (unspecialized) precursor cell found in a differentiated (specialized) tissue that can proliferate indefinitely. Under certain conditions, adult stem cells can differentiate into all the specialized cell types of the tissue from which they originated.
A stem cell from organs and tissues after birth (including umbilical cord and placenta) that can renew itself and transform into other specialized cell types.
A stem cell that has already started to develop into a particular cell type. These stem cells are found in adult tissue and in other fully developed tissue such as cord blood. Adult stem cells replenish the tissues where they are found, such as new skin that develops when a wound heals. They are able to renew themselves and can sometimes grow into other specialized cells.
An undifferentiated cell found in a differentiated tissue that can renew itself and (with certain limitations) differentiate to yield all the specialized cell types of the tissue from which it originated.
Adult stem cells are undifferentiated cells found throughout the body that divide to replenish dying cells and regenerate damaged tissues. Also known as somatic (from Greek Σωματικóς, of the body) stem cells, they can be found in children, as well as adults.