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what system is the brain and spinal cord in what nervous system is the brain and spinal cord in what system is the brain and spinal cord part of what part of the nervous system is the brain and spinal cord in what system is composed of the brain and spinal cord what is brain and spinal cord injury what nervous system includes the brain and spinal cord what organ system includes the brain and spinal cord what body system includes the brain and spinal cord what nervous system includes the brain and spinal cord only
