MeSH definition : A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage
into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive
tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The
inner cell mass gives rise to the embryonic disc and eventual embryo proper.;
MeSH annotation : Mammalian only; non-mammalian, use BLASTULA; /transpl: coordinate BLASTOCYST (NIM
with no qualifiers) EMBRYO TRANSFER (IM); do not confuse with BLASTOCYTES see BLASTOMERES;
Wikipedia link : https://en.wikipedia.org/wiki/Blastocyst;
A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage
into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive
tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The
inner cell mass gives rise to the embryonic disc and eventual embryo proper.