Blastocyst
MESHD001755
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.
Synonyms
- Blastocysts
- Embryo, Preimplantation
- Embryos, Preimplantation
- Preimplantation Embryo
- Preimplantation Embryos
Source last updated 2026-05-24T15:28:08.267Z