A flattened, almost circular bilaminar plate of cells formed when the inner cell mass (aka embryoblast) forms two epithelial layers, each of a distinct lineage, separated by an extracellular basement membrane: the external (dorsal) layer is called the epiblast and the internal (ventral) layer is called the hypoblast (aka primitive endoderm); together, they compose the bilaminar embryonic disc. [ MP:0003886 ]
Synonyms: bilaminary embryonic disc bilaminary germ disc
Term information
- Wikipedia:Bilaminar_disc
- NCIT:C34112
- FMA:293863
- UMLS:C1283997 (ncithesaurus:Bilaminar_Embryonic_Disc)
pheno_slim, early_development