only in taxon only_in_taxon functionally related to functionally related to composed primarily of mesenchymal cell developmental process Eumetazoa tissue mesenchyme http://upload.wikimedia.org/wikipedia/commons/f/f4/Mesenchymal_Stem_Cell.jpg portion of mesenchymal tissue AEO:0000145 UBERON:0003104 mesenchyme tissue mesenchymal tissue BTO:0001393 CALOHA:TS-0620 NCIT:C13301 Portion of tissue composed of mesenchymal cells (motile cells that develop from epthelia via an epithelial to mesenchymal transition) and surrounding extracellular material. Mesenchyme has different embryological origins in different metazoan taxa - in many invertebrates it derives in whole or part from ectoderm. In vertebrates it derives largely from mesoderm, and sometimes the terms are used interchangeably, e.g. lateral plate mesoderm/mesenchyme. TAO:0000393 AAO:0010427 ZFA:0000393 EV:0100007 portion of mesenchyme tissue uberon VHOG:0000170 XAO:0003046 EHDAA2:0003145 UMLS:C0162415 Wikipedia:Mesenchyme