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The nervous system is comprised of two major parts, or subdivisions, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS includes the brain and spinal cord. The brain is the body's control center.
About the nervous system. The two main parts discussed below make up the nervous system. Central nervous system (CNS). The brain and spinal cord are part of the CNS. Peripheral nervous system (PNS). The nerves outside of the CNS that carry information back and forth between the body and the brain are part of the PNS. The PNS helps control the following: