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nervous system

nerv·ous sys·tem

/ˈnərvəs ˈsistəm/

Noun

The nervous system consists of the brain, spinal cord, nerves and sensory organs. It uses electrochemical signals to rapidly transmit information back and forth from all areas of the body. Some signals carry information from sense organs; others carry directions to tissues that execute an action - like a muscle contraction of gland secretion.