C. Sam Balraj*, P. Ramesh Kumar* and K. Jeyaseeli+
* School of Biotechnology, Karunya University, Coimbatore-641114.
+ Department of Biotechnology, Kaliswari College, Sivakasi.
Article submitted on: March 26, 2008
Article published on: April 10, 2008
Embryonic stem cells, as their name suggests, are derived from embryos. Specifically, embryonic stem cells are derived from embryos that develop from eggs that have been fertilized in vitro—in an in vitro fertilization clinic—and then donated for research purposes with informed consent of the donors. They are not derived from eggs fertilized in a woman's body. The embryos from which human embryonic stem cells are derived are typically four or five days old and are a hollow microscopic ball of cells called the blastocyst. The blastocyst includes three structures: the trophoblast, which is the layer of cells that surrounds the blastocyst; the blastocoel, which is the hollow cavity inside the blastocyst; and the inner cell mass, which is a group of approximately 30 cells at one end of the blastocoel.
◊An article from C. Sam Balraj, P. Ramesh Kumar and K. Jeyaseeli, (2008 April 10). Generating embryonic stem cells. Biology-Online.org. Retrieved from http://www.biology-online.org/articles/generating-embryonic-stem-cells.html.