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How does the nervous system work?
Quick answer
The nervous system works like the body's electrical wiring. Sensors detect a stimulus and fire tiny electrical signals along neurons to the spinal cord and brain, which decide what to do and send signals back to muscles — all in a fraction of a second. It's how you feel, think, and move.
Step by step
- Neurons carry fast electrical signals.
- Path: sensors → spinal cord/brain → muscles.
- The brain processes and decides the response.
- All in a split second — sense, think, act.
People also ask
How does the nervous system send signals?
Neurons pass tiny electrical impulses along their length and chemical messengers across the gaps between them.
What's the difference between the brain and the nervous system?
The brain is the control centre; the nervous system is the whole network of nerves connecting it to the rest of the body.
What is a reflex?
A fast automatic response handled by the spinal cord without waiting for the brain — like pulling your hand off something hot.
Part of the guide: How Your Body Works →