These nerve pairs spread throughout your body to deliver commands from your brain and spinal cord to and from parts of your body. Diagram. The central nervous system and peripheral nervous system work ...

The CNS is the brain and spinal cord. Muscles contracting or glands secreting hormones are the response of effectors coordinated by the CNS. Receptors are groups of specialised cells. They detect ...

Sensory neurones carry electrical signals - nerve impulses - towards the central nervous system (spinal cord and brain). The signal starts in a receptor which detects a change. Relay neurones ...