part of part of develops from develops from has skeleton organism subdivision upper jaw region lower jaw region http://upload.wikimedia.org/wikipedia/commons/6/64/Gray176.png EHDAA2:0001018 EMAPA:17906 Subsequent vertebrate evolution has also involved major alterations to the pharynx; perhaps the most notable occurred with the evolution of the gnathostomes. This involved substantial modifications to the most anterior pharyngeal segments, with the jaw forming from the first, anterior, pharyngeal segment, while the second formed its supporting apparatus, the hyoid.[well established][VHOG] AAO:0000272 See notes for jaw w.r.t skeletal element vs subdivision of head FMA:59398 Subdivision of head that consists of the lower jaw skeletal elements plus associated soft tissue (skin, lips, muscle)[cjm]. UBERON:0001710 lower part of mouth mandibular part of mouth EFO:0003660 Wikipedia:Lower_jaw VHOG:0000453 EHDAA:7995 Inferior mandibular arch located on the anterior and lateral sides of the skull.[AAO] MESH:D008334 ncithesaurus:Lower_Jaw Note isa/partof difference MA/FMA mandibular series SCTID:362637005 skeleton of lower jaw mandibular prominence jaw region