Visceral arches are pieces of cartilage or bone that support the pharyngeal region in vertebrates and help attach the jaws to the skull. There are typically 7 pairs of visceral arches that are modified differently in vertebrate groups depending on the presence of gills and jaw suspension type. Cyclostomes lack identifiable typical cartilage patterns and have a fused branchial basket to support gills. Elasmobranchs have a full set of visceral arches and 3 unpaired branchial cartilages. Bony fishes have modifications for jaw movement and suspension with a reduced last arch. Amphibians have 6 arches as larvae with the last 3 bearing gills, and modifications form their air breathing