《英文msh词典》Embryo,Preimplantation
[同义词] Embryo,Preimplantation
[主题词] Blastocyst
[中文释义] 胚胎,植入前
[英文释义] Early preimplantation mammalian EMBRYO in the post-MORULA stage. Its structure consists of a TROPHOBLASTS-enclosed fluid-filled cavity with an inner cell mass. After EMBRYO IMPLANTATION,the inner cell mass of the blastocyst becomes the embryonic disc of the developing embryo.