| 单词 | nervous system |
| 释义 | nervous systemSEE SYNONYMS FOR nervous system ON THESAURUS.COM noun Anatomy, Zoology.the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. a particular part of this system. Compare autonomic nervous system, central nervous system, peripheral nervous system. Origin of nervous systemFirst recorded in 1730–40 Words nearby nervous systemnervous breakdown, nervous exhaustion, nervous indigestion, nervous lobe, nervous Nellie, nervous system, nervous wreck, nervule, nervuration, nervure, nervus Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for nervous systemnervous system nounthe sensory and control apparatus of all multicellular animals above the level of sponges, consisting of a network of nerve cellsSee neurone See also central nervous system Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for nervous systemnervous system 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. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for nervous systemnervous system n.The system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli. In vertebrates it consists of the brain, spinal cord, nerves, ganglia, and parts of the receptor and effector organs. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for nervous systemnervous system [ nûr′vəs ] 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. See also autonomic nervous system central nervous system peripheral nervous system. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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