Myelin sheath - prevents cross talk which could result in incorrect impulses being generated.
Insulation helps electrical impulses to pass along in hops so signals travel along the neurone faster
CNS - brain and spinal cord coordinates responses
Peripheral N.S - nerves- connecting the brain to different parts of the body + sense organs changes in environment - detected by sense organs which have specialised cells that detect environmental changes/ stimulus - called receptors. Receptors- pass on signals
