Photo detail

Human embryonic stem cells are isolated from early-stage embryos, four or five days after fertilization, called blastocysts. The blastocyst is a hollow sphere made of approximately 150 cells and contains three distinct areas: the trophoblast (a surrounding outer layer of cells), the blastocoel (a fluid-filled cavity), and the inner cell mass (a cluster of cells that can become the fetus). hESCs are isolated from the inner cell mass.

Be succinct, constructive, and relevant to the story. Leaving a comment means you agree to our Discussion Guidelines. We like civilized discourse. We don't like spam, lying, profanity, harassment or personal attacks.

comments powered by Disqus
event calendar sponsored by: