Types+of+Stem+Cells

In total there are three kinds of stem cells: embryonic, adult stem cells & meristematic. Embryonic & adult stem cells reside in humans, where as meristematic inhabit plants.
 * A Look At Stem Cells**


 * Embryonic** are found in the embryo, and are all different from one another = preform different functions.
 * Adult stem cells** can regenerate to form new skin cells to replace missing/torn tissue.


 * Embryonic** stem cells come from eggs that have been fertilized //in vitro,// or in other words, they have not been fertilized in a woman's body. The eggs that are donated have the informed consent of the woman and are usually a few days old (four to five) and come in a form of a microscopic ball of cells. It is these embryonic stem cells that are causing the most commotion because they can, in theory, turn into any one of the different types of cell in the body.
 * Adult Stem Cells** are thought to be //undifferentiated// cells or unseperatable cells, found among differentaited cells in a tissue or organ that can renew itself and can alter itself to yeild some or all of the major specialized cell types of the tissue or organ.[[image:http://www.genealogygems.tv/Images/Arrow%20right.JPG width="155" height="56" align="right"]]

__Choice Between Embryonic Stem Cells & Adult Stem Cells__: Given the disagreement around embryonic stem cell research, it would be less strained if adult stem cells offered the same potiential as embryonic stem cells. Embryonic stem cells are thought to have a much greater developmental potential then adult stem cells. In theory they, can become all types of tissue, which offers hope of a cure for many different diseases.