I think it’s the measure the Heart Beat of an animals heart
I might be wrong, but I think it's a verb. :^]
An axon is a long projection of the nerve cell which conduct electrical impulse away from the neuron. The function of the axon is to transmit information to different neurons. Myelin is always found wrapped around the axon of neurons to create myelin sheath. The myelin sheath helps the axon by increasing the speed at which impulse propagation takes place
