develops from develops from endochondral bone neural arch http://upload.wikimedia.org/wikipedia/commons/3/30/Gray82.png vertebra dorsal arch (...) certain common components [of vertebral structure] are found in nearly all vertebrate. A representative vertebra has a vertebral arch or neural arch, which extends dorsally around the spinal cord.[well established][VHOG] SCTID:317373001 arcus vertebrae (vertebralis) relationship loss: develops_from basidorsal (TAO:0001060)[TAO] ZFA:0001066 TAO:0001066 the dorsal bony and/or cartilaginous part of a vertebra, consisting of a pair of pedicles, a pair of laminae, and seven processes (four articular processes, two transverse processes, and one spinous process) arcus vertebra VHOG:0001670 AAO:0000725 MA:0001453 Posterior part of a vertebra that consists of a pair of pedicles and a pair of laminae, and supports seven processes: four articular processes, two transverse processes one spinous process[WP]. ZFA: A neural arch encloses the neural canal and typically meets its partner to form a neural spine. arcus vertebrae UBERON:0003861 UMLS:C0223076 Bony arch perched on the vertebral centrum; successive arches enclose the neural canal that surrounds and protects the spinal cord dorsally.[AAO] The neural arch can be a replacement ossification of the basidorsal cartilage or can form directly in membrane bone tiny neural arches present in Hagfish (which lack a true vertebraal column). Wikipedia:Vertebral_arch FMA:11946 A neural arch encloses the neural canal and typically meets its partner to form a neural spine. The neural arch can be a replacement ossification of the basidorsal cartilage or can form directly in membrane bone.[TAO] arcus vertebrae EFO:0003618 vertebra neural arch dorsal arcocentrum NCIT:C32138 cartilaginous neural arch arch of centrum of vertebra