[that part of the central nervous system which is lodged in the vertebral canal; 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; it is enclosed in three protective membranes, the meninges. ( CSP )]
UMLS (NCI) C0037925 - Body Part, Organ, or Organ Component
Relation/PAR: Body Part
central nervous system
Relation/CHD: dorsal root
Ventral Nerve Root
dorsal horn
dorsal column
ventral column