cavitated compound organ spinal cord http://upload.wikimedia.org/wikipedia/commons/5/58/Spinal_cord_direv.svg AAO:0010151 NCIT:C12464 CALOHA:TS-0953 TODO - add superclass to unify with VNC? fissura cerebro-cerebellaris SpC BAMS:SP Part of the central nervous system which descends from the hindbrain within the vertebral column.[AAO] EMAPA:17577 spinal medulla uberon DMBA:17651 cerebrocerebellar fissure OpenCyc:Mx4rvVjjk5wpEbGdrcN5Y29ycA spinal cord structure BAMS:Spinal (...) at some stage of its development, every chordate exhibits five uniquely derived characters or synapomorphies of the group: (...) (4) a single, tubular nerve cord that is located dorsal to the notochord (...) (reference 1); The neural tube is destined to differentiate into the brain and spinal cord (the central nervous system) (reference 2).[well established][VHOG] MIAA:0000183 http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=22 Part of the central nervous system located in the vertebral canal continuous with and caudal to the brain; demarcated from brain by plane of foramen magnum. It is composed of an inner core of gray matter in which nerve cells predominate, and an outer layer of white matter in which myelinated nerve fibers predominate, and surrounds the central canal. (CUMBO). BM:SpC FMA:7647 MESH:D013116 EFO:0000110 TAO:0000075 MA:0000216 BTO:0001279 VHOG:0000601 XAO:0000020 BIRNLEX:1709 UBERON:0002240 medulla spinalis UMLS:C0037925 EV:0100316 fissura cerebrocerebellaris cerebro-cerebellar fissure DHBA:12890 EHDAA2:0001255 MAT:0000183 GAID:695 EHDAA:2863 ZFA:0000075 ectoderm-derived structure dorsal region element structure with developmental contribution from neural crest