part of part of develops_from embryo germ layer A layer of cells produced during the process of gastrulation during the early development of the animal embryo, which is distinct from other such layers of cells, as an early step of cell differentiation. The three types of germ layers are the endoderm, ectoderm, and mesoderm. AAO:0000480 BILA:0000035 BTO:0000556 Classically the germ layers are ectoderm, mesoderm and endoderm. Alternatively: primary = ectoderm, endoderm; secondary=mesoderm; tertiary=dorsal mesoderm, NC[https://github.com/obophenotype/uberon/wiki/The-neural-crest] EMAPA:36033 FBbt:00000110 FMA:69069 GAID:1303 MESH:A16.254.425 TAO:0001122 The Bilateria are triploblastic (with true endoderm, mesoderm, and ectoderm) (...).[well established][VHOG] UBERON:0000923 UMLS:C0920502 UMLS:C1708239 VHOG:0001223 XAO:0003011 ZFA:0001122 embryonic germ layer embryonic germ layers embryonic tissue germinal layer primary germ layer uberon epiblast (generic) germ layer / neural crest