Células madre y células troncoembrionarias: Diferencias biológicas Stem cells and embryonic stem cells: Biological differences

The stem cells have been classifi ed in three types according to their natural niche of origin, aptitude and differen- tial function: totipotential, pluripotential and multipotential; the fi rst, called embryonic stem cells (ES) originate from the morulae; the second, come from the inner cell mass of the blastocyst (ICM); and the third, known as multipotent adult progenitor cells (MAPC)