part of part_of part of part_of luminal space of immaterial entity anatomical entity central nervous system organ cavity lumen of central nervous system FMA:75007 The cavity that is enclosed by the central nervous system. In vertebrates this is the cavity that includes as parts ventricular cavities and the central canal of the spinal cord that develops from the lumen of the neura tube UBERON:0002561 cavity of neuraxis cavity of ventricular system of neuraxis neuraxis cavity neuraxis lumen uberon