part_of part of part of multicellular organism embryo mesoderm http://upload.wikimedia.org/wikipedia/commons/e/e8/Mesoderm.png EHDAA:124 Wikipedia:Mesoderm embryonic mesoderm EHDAA:160 BILA:0000037 NCIT:C12750 UBERON:0000926 The middle germ layer of the embryo, between the endoderm and ectoderm. VHOG:0000152 XAO:0000050 GAID:522 FMA:69072 EHDAA2:0001128 mesodermal mantle MESH:D008648 Primary germ layer that is the middle of the embryonic germ layers.[AAO] EV:0100006 The Bilateria are triploblastic (with true endoderm, mesoderm, and ectoderm) (...).[well established][VHOG] BTO:0000839 CALOHA:TS-0623 EHDAA:183 TAO:0000041 ZFA:0000041 MAT:0000174 UMLS:C0025485 sponges do not seem to have a mesoderm and accordingly Amphimedon lacks transcription factors involved in mesoderm development (Fkh, Gsc, Twist, Snail)[http://www.nature.com/nature/journal/v466/n7307/full/nature09201.html]. Mesoderm may not be homologous across verteberates SCTID:362854004 MIAA:0000174 entire mesoderm EFO:0001981 AAO:0000304 FBbt:00000126 EMAPA:16083 UBERON:0003263 mesodermal embryonic structure zebrafish component