Well, there are two kinds of stem cells: adult stem cells, which you can get from any part of a grown body, and embryonic stem cells. These are the inner- core of days-old embryos that can develop into any kind of cell.
-- Mort Kondracke
   
Mort Kondracke   Name:
Mort Kondracke
Type:
Journalist
Nationality:
American
Birth:
April 28, 1939
https://www.nutquote.com/quote/Mort_Kondracke