One way to conceptualize the relationship among the elements of the nervous system is to use a hierarchical organization. Using this kind of scheme, the

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The peripheral nervous system is indeed divided into the somatic and autonomic nervous systems. The somatic nervous system is responsible for voluntary movements and sensory information processing, while the autonomic nervous system controls involuntary bodily functions and is further divided into the sympathetic and parasympathetic nervous systems.  The somatic nervous system regulates the action of the body's skeletal muscles. The autonomic nervous system sustains basic life processes and survival of the organism.

One Way to Conceptualize the Relationship Among the Elements of the Nervous