London, United Kingdom
Blastocyst In The Uterus
Photograph - Photograph
Blastocyst in the uterus, computer artwork. The blastocyst (right) is a ball of embryonic cells that is a stage in the development of a fertilised egg. This stage is formed before implantation into the wall of the uterus (the wall is seen at left). The blastocyst stage develops from the morula stage, and by now consists of more than 32 cells. Some differentiation has also occurred, with the outer layer of cells here being distinct from the inner cell mass and fluid-filled cavity (neither seen). These outer cells will form the placenta, while the inner cell mass will develop into the embryo.
May 1st, 2013
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