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the nervous system is shown in this diagram, and shows how it's functions
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simplypsychology.org

Somatic Nervous System

The somatic nervous system (SNS) is a component of the peripheral nervous system responsible for voluntary movement and the reception of external stimuli. It regulates activities under conscious control, such as skeletal muscle contraction. The SNS comprises motor neurons that activate muscles and sensory neurons that relay information from sensory receptors to the central nervous system.
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Simply Psychology
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