Peripheral Nervous System - SS3 Biology Lesson Note

The peripheral nervous system (PNS) is a division of the nervous system that extends outside the central nervous system (CNS), which includes the brain and spinal cord. It consists of nerves, ganglia, and sensory receptors that connect the CNS to the rest of the body. The PNS is responsible for transmitting sensory information from the body to the CNS and relaying motor commands from the CNS to the muscles and organs.

The peripheral nervous system plays a vital role in connecting the CNS to the body, allowing for sensory perception, motor control, and autonomic regulation. It enables us to sense and respond to the environment, move our muscles, and maintain essential bodily functions. Disorders or injuries to the PNS can result in sensory deficits, muscle weakness or paralysis, and disturbances in autonomic functions.