What are the similarities and differences between embryonic and adult stem cells ? The primary roles of adult stem cells in a living organism are to maintain and . Are they "leftover" embryonic stem cells, or do they arise in some other way?.
1) From the body itself: Scientists are discovering that many tissues and organs contain a small number of adult stem cells that help maintain them. Adult stem.
Adult stem cells are undifferentiated cells, found throughout the body after development, that indefinitely, and generate all the cell types of the organ from which they originate, potentially regenerating the entire organ from a few cells.
These stem cells come from embryos that are three to five days old. Until recently, researchers thought adult stem cells could create only similar types of cells.