The neurons of the spinal cord are part of the a. somatic...

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Key Concepts

Peripheral Nervous System

The peripheral nervous system (PNS) includes all the neural structures outside the brain and spinal cord. It functions as a communication relay between the CNS and the rest of the body, transmitting information to and from the central control center.

Somatic and Autonomic Nervous Systems

These are the two major subdivisions of the peripheral nervous system. The somatic nervous system controls voluntary movements and mediates sensory information, whereas the autonomic nervous system regulates involuntary functions such as heart rate, digestion, and respiratory rate, maintaining the body’s internal balance.

Neurons

Neurons are the basic, specialized cells of the nervous system responsible for transmitting information through electrical and chemical signals. They form intricate networks both in the CNS and PNS, which are essential for all aspects of neural communication.

Central Nervous System

The central nervous system (CNS) is composed of the brain and spinal cord. It serves as the main control center of the body, processing sensory information and coordinating responses. In the CNS, neurons interact extensively to manage and integrate signals that direct nearly all bodily functions.

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