Peripheral Nervous System (PNS)
The Peripheral Nervous System (PNS) is a major division of the nervous system consisting of nerves located in the periphery of the body, which includes everything outside the central nervous system (CNS). These thick bundles of axons carry messages back and forth between the CNS and the body's muscles, organs, and senses.
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Cells of the Nervous System
Imagine you see a glass of water on a table and decide to take a drink. Your eyes send the visual information, your brain makes the decision, and a signal is sent to your arm and hand muscles to reach out and grasp the glass. How do the two primary subdivisions of the nervous system work together to accomplish this action?
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Comparison of the Central and Peripheral Nervous Systems
A person accidentally touches a hot surface and immediately pulls their hand away. This reflex action involves sensory information traveling to the spinal cord, which then sends a command back to the muscles in the arm. How does this scenario illustrate the distinct functions of the two major subdivisions of the nervous system?
Central Nervous System (CNS)
Peripheral Nervous System (PNS)