A column of nerve tissue that runs from the base of the skull down the back. It is surrounded by three protective membranes, and is enclosed within the vertebrae (back bones). The spinal cord and the brain make up the central nervous system, and spinal cord nerves carry most messages between the brain and the rest of the body.
Last updated: 2014-05-21
Source: The National Cancer Institute's Dictionary of Cancer Terms (http://www.cancer.gov/dictionary)