The nervous system is made up of the central nervous system and the peripheral nervous system. The central nervous system consists of the brain and spinal cord and coordinates functions in the body. It contains neurons that receive sensory input and relay information to motor neurons to trigger responses. Reflex actions automatically and rapidly integrate stimuli and responses along a reflex arc involving receptors, sensory neurons, relay neurons, and motor neurons.

1. NERVOUS SYSTEM
• CENTRAL NERVOUS SYSTEM
• PERIPHERAL NERVOUS SYSTEM
Together they coordinate and regulate body
functions

2. CENTRAL NERVOUS SYSTEM

3. PERIPHERICAL

4. CENTRAL NERVOUS SYSTEM
Areas of coordination:
• Brain
• Spinal cord

5. BRAIN AND SPINAL CORD

6. BRAIN

7. NEURONE

8. Sensory neurones and motor
neurones

9. Relay neurones

10. REFLEX ACTIONS
• Automatically and rapidly integrating and
coordinating stimuli with responses
REFLEX ARC: - stimuli
- receptor
- sensory neurones
- relay neurones (connector)
- motor neurones
- effectors (muscles or glands)