Sensory neuron - carry messages from PNS to CNS. Have long dendrites & short axons.
Relay neuron - connect sensory neurons to motor or other relay neurons. Have short dendrites, short axons and no myelin sheath
Motor neuron - connect CNS to effectors such as muscles and glands. Have short dendrites & long axons
Cell body - contains genetic material
Dendrites - carry nerve impulses from other neurons to cell body
Axon - carries electrical impulses down length of neuron
Myelin sheath - protects axon
Nodes of ranvier - speed up transmission of impulse
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