Blastocyst inner cell mass; Inner Cell Mass, Blastocyst
Blastocyst inner cell mass; Inner Cell Mass, Blastocyst . Blastocyst, a distinctive stage of a mammalian embryo. It is a form of blastula that develops from a berrylike cluster of cells, the morula. Inner cell mass wikidoc from www.wikidoc.org (apex) how do the cells in a blastocyst as it. A blastocyst forms about five to six days after a sperm fertilizes an egg. Layers of cells in the blastocyst divide and separate.