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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 nervous system is divided into two systems. The Central Nervous System which is the brain and the spinal cord, and the Peripheral Nervous System which is the 12 cranial nerves, 31 pairs of spinal nerves and ganglia. The Peripheral Nervous System provides communication between the brain and spinal cord and the bodyâs muscles, glands and sensory receptors.