2.83

2.83: recall that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves


Key Points:
1. The main parts of the nervous system are the brain and the spinal cord.
2. They are made up of nervous tissue , and the brain is protected by the skull and the spinal cord is protected by the back bone.
3. Nerves are what connect the central nervous system to the rest of the body, and these are made of neurones
4. Sense organs are receptors - they send messages to central nervous system.  These are sent via the sensory neurones.
5. Muscles and glands are effectors - the central nervous system send them impulses along motor neurones