• Nerve cells (neurons), sense and transmit information.
• A neuron has dendrites, cell body (soma), and an axon.
• In the peripheral nervous system, a bundle of axons is called a nerve. In the central nervous system, a bundle of axons is called a tract.
• Nerves transport messages quickly and accurately in the body.
• The impulse is transferred from one nerve cell to another chemically by means of a neurotransmitter.
• Keywords: nerve, nerve cell, neuron, impulse, dendrites, axon, axon terminal.