The nervous system coordinates body activity by sending electrical and chemical signals. It supports movement, sensation, memory, emotion, reflexes, and automatic body functions.
Main parts
The central nervous system includes the brain and spinal cord. The peripheral nervous system includes nerves that connect the rest of the body to the central system.
Neurons
Neurons are specialized cells that receive, process, and transmit information. They communicate through connections called synapses.
Everyday role
The nervous system helps people respond to touch, pain, temperature, light, sound, balance, and internal body signals.