The embryonic lineage that generates the embryo proper and, in mammals, also contributes to certain extraembryonic tissues. It is distinct from the hypoblast.
The early lumen associated with epithelializing mouse epiblast. Its formation involves polarity and apical membrane separation rather than requiring elimination of a central mass by apoptosis.
The characteristic early postimplantation mouse embryo arrangement, with cup-shaped epiblast, extraembryonic ectoderm and surrounding visceral endoderm. It differs geometrically from a flat embryonic disc.
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