develops from ends during starts during branchial arch visceral pouch 5 death branchial arch 3 fifth visceral arch xenopus_anatomy third branchial arch UBERON:0003116 The third in a series of paired bars in the wall of the pharynx, within which are formed the third aortic arch and the cartilage bar of the visceral skeleton, and forms and supports the gills. XAO:0000451 NF stage 35 and 36