Most of the 100 billion neurons in your body are located in your brain; they communicate electrically and chemically.
Sensory Neuron
This neuron receives information from the environment and transmits it from the PNS towards the CNS. They have long dendrites and short axons.
Relay Neuron
These connect sensory neurons to motor neurons or other relay neurons. They have short dendrites and short axons. They can carry information to and from the CNS.
Motor Neuron
This neuron connects the CNS to effectors (glands or muscles). They have short dendrites and long axons. They carry information from the CNS towards the PNS.
