A thick, whitish cord of nerve tissue which is a major part of the vertebrate central nervous system. It extends from the brainstem down through the spine, with nerves branching off to various parts of the body. It is enclosed in and protected by the vertebral column.
a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tube-like structure extending from the base of the brain through the vertebral canal to the upper lumbar region
a major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region
