Title: Opcional

Text: Stem cells can turn into a lot of different cell types when you are a small child. Stem cells are not tissue-specific. They can use cell division to create more cells. They are able to do cell division after a long time and they can do it many times. They can develop into specialized cells. Stem cells have DNA and a nucleus. Stem cells can is used for bone marrow transplantation. This has helped thousands of people. In certain situations stem cells can become specialized and do one thing. Cada párrafo será una prueba.

Save test: Use esta opción si usted desea compartir esta prueba (sólo para usuarios autenticados).