Table 1.
Derivatives of Specific Blastocyst Cell Types in Human Development
| Blastocyst stage cell type | Embryonic derivatives | Fetal derivatives |
|---|---|---|
| ICM | ||
| Epi | Extraembryonic Ectoderm | Ectoderm of the amniotic membrane |
| Extraembryonic Mesoderm | Mesoderm of the amniotic membrane, chorionic membrane and yolk sac and fetal vessels of the placenta | |
| Ectoderm, Mesoderm and Endoderm | All tissues of the postnatal body | |
| PE | Extraembryonic Endoderm | Endoderm of the yolk sac |
| Polar TE | Syncytiotrophoblast | Placental tissue |
| Cytotrophoblast | ||
| Mural TE | Cytotrophoblast | Placental tissue |
a
In humans, PE is also referred to as hypoblast.
Epi, epiblast; ICM, inner cell mass; PE, primitive endoderm; TE, trophectoderm.