Neuron: cell composed of a cell body, an axon and dendrites, forming a functional unit of the nervous system.
Dendrite: cytoplasmic extension of a nerve cell.
Axon: extension of a neuron.
Terminal arborisation: final division.
Motor end plate: muscular organ that becomes active in response to stimuli.
Muscle fibre: set of cells making up a muscle.
Myelin sheath: envelope of phosphorated fats.
Cytoplasm: gel contained in a cell.
Nucleus: central part of a cell, containing the chromosomes.
Cell body: part of the nerve cell between the axon and the dendrite.