Definition Of Embryonic Stem Cell
Definition:
Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage embryo. Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells. Isolating the embryoblast or inner cell mass (ICM) results in destruction of the fertilized human embryo, which raises ethical issues. Those issues include whether or not a human life at the embryonic stage should be granted the moral status of a human being. Human ES cells measure approximately 14μm while mouse ES cells are closer to 8μm
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