part of part of aorta trunk blood vessel right dorsal aorta A study of embryos shows that in all vertebrates six arterial arches link the ventral aorta with a pair of lateral dorsal aortae on each side of the body. The latter unite posteriorly to form a single median dorsal aorta wich takes blood to the body.[well established][VHOG] EHDAA2:0001720 EHDAA:406 EMAPA:16206 MA:0000479 Normally regresses in humans UBERON:0005622 VHOG:0000485 uberon dorsal aorta