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Self-renewal and differentiation


Stem cells have the unique ability make identical copies of themselves. This property maintains unspecialized and undifferentiated cells within the body. Differentiation is the process by which a cell becomes more specialized. For stem cells, this usually occurs through several stages, where a cell proliferates giving rise to daughter cells that are further specialized.  For example, an endothelial progenitor cell (EPC) is more specialized than an ESC, and an EC is more specialized than an EPC. The further specialized a cell is, the more differentiated it is and as a result it is considered to be more committed to a certain cellular lineage. 

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