Animation of the structure of a nerve cell, or neuron. The cell has many branching processes called dendrites that receive signals and pass them to the central cell body containing the nucleus. The input of these signals determines the output of the nerve cell, which is carried by the long axon (down centre). The axon (nerve fibre) is wrapped in a myelin sheath, which improve its conduction of the signal. At the end of the axon it branches into several telodendria, which relay its signal to their targets, typically other nerve cells or muscle.