the human nervous system:
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The human nervous system has two main parts: the central nervous system (the brain and spinal cord) and the peripheral nervous system (the nerves that carry impulses to and from the central nervous system). The peripheral nervous system:
The peripheral nervous system is a channel for the relay of sensory and motor impulses between the central nervous system on one hand and the body surface, skeletal muscles, and internal organs on the other hand. The central nervous system:
The central nervous system consists of the brain and spinal cord, both derived from the embryonic neural tube.
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