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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.
The PNS is then divided into two two divisions known as the somatic division (voluntary) and the autonomic division (involuntary). The autonomic nervous system is then once more divided into the sympathetic and parasympathetic divisions. 29 people found this useful.