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what body system is the spinal cord a part of what organ system is the spinal cord apart of what body system is the brain and spinal cord apart of what body system is the spinal cord in which body system are the brain and spinal cord a part of which body system are the brain and spinal cord a part of muscular nervous respiratory skeletal what organ system is the spinal cord in what body system is the spinal column in what system is the spinal cord in which system does the spinal cord belong to
