Biology what is the definition of blastocyst in biology? Asked by bookragstutor 13 years ago 8/20/2012 9:52 AM Last updated by anonymous 12 years ago 12/7/2012 12:26 AM
A blastocyst is when cleavage produces a thin walled hollow sphere and the embryo is a mass of cells at one side. It is formed before implantation and is like a blastula.
