jaw skeleton GAID:214 jaws ZFA:0001227 BTO:0001749 jaw cartilage Skeletal and cartilage elements of the first pharyngeal arch.[TAO] oral jaw skeleton mandibular arch EMAPA:35455 NCIT:C48821 UMLS:C0022359 SCTID:181811001 MA:0001905 Wikipedia:Jaw galen:Jaw MESH:D007568 pharyngeal arch 1 skeleton Subdivision of skeleton which includes upper and lower jaw skeletons. TAO:0001227 FMA:54396 jaw There are cellular contributions from all three embryonic germ layers: pharyngeal mesoderm, endoderm and neural crest that migrates out of the ectoderm (Noden, 1983). AAO:0000988 in FMA, the jaw is an organism subdivision cluster, and includes mucosal tissue such as the gingiva as parts. It appears to be skeletal in MA (and has teeth as parts). It is reasonable to assume that ZFA and XAO consider the upper and lower jaws to be skeletal elements or clusters. EHDAA2 also considers these clusters. TODO - follow EHDAA2 model. These arbitrary differences in terminology and classification have to be reconciled with the genuine well-known biological differences in the skeletal elements across vertebrates UBERON:0001708 anterior splanchnocranium TODO - move ZFA:0001227 (it is the entire jaw skeleton). mandibular arch skeleton visceral arch 1 structure with developmental contribution from neural crest subdivision of skeleton