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what system is the brain and spinal cord part of what nervous system is the brain and spinal cord part of what system is the brain and spinal cord in which body system the brain and spinal cord are part of what system is composed of the brain and spinal cord what nervous system is the brain and spinal cord in what part of the nervous system is outside the brain and spinal cord what part of the nervous system is made of the brain and spinal cord what part of the nervous system is made up of the brain and spinal cord what are the two types of nervous system which system does the spinal cord belong to
