nervous system

[nur-vuhs sis-tuhm]

noun

Anatomy, Zoology.

1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia.

2. a particular part of this system.

nervous system

noun

1. the sensory and control apparatus of all multicellular animals above the level of sponges, consisting of a network of nerve cells See neurone See also central nervous system

nervous system

1. The system of neurons and tissues that regulates the actions and responses of vertebrates and many invertebrates. The nervous system of vertebrates is a complex information-processing system that consists mainly of the brain, spinal cord, and peripheral and autonomic nerves. It receives chemical information from hormones in the circulating blood and can also regulate secretions of the endocrine system by the action of neurohormones. The nervous systems of invertebrates vary from a simple network of nerves to a complex nerve network under the control of a primitive brain.

2. See also autonomic nervous system central nervous system peripheral nervous system

nervous system

1. The system in the body that controls internal functions of the body and receives, interprets, and responds to stimuli. The nervous system is made up of the brain, the spinal cord, the nerves, and the sense organs, such as the eye and ear.

Word History and Origins

Origin of nervous system¹

First recorded in 1730–40

Example Sentences

I was never able to settle my nervous system, find contentment with anyone or take care of my interior life.

From Los Angeles Times

According to the complaint, the girl suffered bodily injuries and shock to her nervous system, which continue to cause her mental and physical pain.

From Los Angeles Times

Side effects related to the nervous system include hallucinations, delusions, depression, confusion and trouble breathing.

From Los Angeles Times

Magnesium glycinate is supposed to help support muscle function, improve sleep quality and regulate the body's nervous system.

From BBC

The couple were intoxicated from a “central nervous system stimulant,” authorities said.

From Los Angeles Times