Overview of the human nervous system, illustrating the central and peripheral divisions with key components like sensory and motor pathways.

Diagram of the human nervous system showing the central nervous system (brain and spinal cord) and peripheral nervous system with subdivisions including somatic, autonomic, sympathetic, and parasympathetic pathways.

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Show Answer Key & Explanations Step-by-step solution for: Warfighter brain health—Part 1: Nervous system | HPRC

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- The nervous system is divided into two main parts: the Central Nervous System (CNS) and the Peripheral Nervous System (PNS).
- The CNS consists of the brain and spinal cord, which process and integrate information.
- The PNS connects the CNS to the rest of the body and is subdivided into the Autonomic and Somatic nervous systems.
- The Autonomic nervous system controls involuntary functions and is further divided into the Sympathetic (responsible for "fight or flight" responses) and Parasympathetic (responsible for "rest and digest" functions) systems.
- The Somatic nervous system controls voluntary movements and is composed of Sensory (afferent) neurons that carry information to the CNS and Motor (efferent) neurons that carry commands from the CNS to muscles and glands.

Parent Tip: Review the logic above to help your child master the concept of nervous system.

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