Axon
The role of axons is to transmit information around the body between neurons, muscles, and the glands. Axons are one of two extensions of a neuron, the other one is the dendrites  and axons are covered by a membrane called the axolemma and the cytoplasm of the cell is the axoplasm. Most messages are sent across neurons in the form of neurotransmitters which travel across synapses (connection between two neurons) and axons branch off into telodendria. Impulses are sent down the axons in the form of action potentials which activate the neurotransmitter release when it hits the axon terminal.