Stem Cells part 18

Stem cell 4

 

Classification of stem cells on the basis of their sources

The easiest way to categorize stem cells is by dividing them into two types:

Early or embryonic and mature or adult. Early stem cells, often called embryonic stem cells, are found in the inner cell mass of a blastocyst after approximately five days of development. Mature stem cells are found in specific mature body tissues as well as the umbilical cord and placenta after birth.

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