Embryonic stem cells are primitive cells derived from a blastocyst, or early stage embryo. These cells have not yet formed into adult stem cells.
Embryonic stem cells are referred to as being pluripotent, meaning they have the capacity to become any cell in the human body. Because of this, and their ability to replicate indefinitely, embryonic stem cells can be employed as useful tools in regenerative medicine, research, and clinical use.
Still want to learn more? Check out this video from our friends at Stem Cell Network.