pharyngeal arch pharyngeal arch 6 6 6th pharyngeal arch UBERON:0004349 A conserved feature of all vertebrate embryos is the presence of a series of bulges on the lateral surface of the head, the pharyngeal arches; it is within these structures that the nerves, muscles and skeletal components of the pharyngeal apparatus are laid down. The pharyngeal arches are separated by endodermal outpocketings, the pharyngeal pouches.[well established][VHOG] 6th visceral arch AAO:0010368 uberon The forth in a series of paired bars in the wall of the pharynx, within which are formed the forth aortic arch and the cartilage bar of the visceral skeleton, forms and supports the gills.[AAO] FMA:293047 fourth branchial arch EMAPA:32766 sixth pharyngeal arch visceral arch 6 sixth visceral arch UBERON:0003117 VHOG:0001205 The 6th pharyngeal arch. contributes to the development of the sternocleidomastoid and trapezius muscles. XAO:0000453 EHDAA2:0004075 TAO:0001601 sixth branchial arch SCTID:308772004 6th arch ZFA:0001609 branchial arch 4 gill arch 4