What is nervous system?

  • (noun): The sensory and control apparatus consisting of a network of nerve cells.
    Synonyms: systema nervosum

Nervous System

The nervous system is the part of an animal's body that coordinates the actions of the animal and transmits signals between different parts of its body. In most types of animals it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord. The PNS consists mainly of nerves, which are long fibers that connect the CNS to every other part of the body. The PNS includes motor neurons, mediating voluntary movement, the autonomous nervous system, comprising the sympathetic nervous system and the parasympathetic nervous system and regulating involuntary functions, and the enteric nervous system, a semi-independent part of the nervous system whose function is to control the gastrointestinal system.

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Some articles on nervous system:

Canine Brain Tumors
... Cancer of the nervous system is common in domestic canids, and includes primary neoplasia of the peripheral nervous system, primary neoplasia of the central nervous system and various metastatic cancers ... Some of the most common of the central nervous system tumors are several types of primary (originating from brain tissue) canine brain tumors ...
Ctenophores - Description - Common Features - Nervous System and Senses
... Ctenophores have no brain or central nervous system, but instead have a nerve net (rather like a cobweb) that forms a ring round the mouth and is densest near ... "mood", in other words the overall state of the nervous system ...
Sexually-induced Sneezing - Causes
... may be genetically determined, and may result from the way the central nervous system is wired "his reflex demonstrates evolutionary relics in the wiring of a part of the nervous system called the autonomic nervous ... Sometimes the signals in this system get crossed, and I think this may be why some people sneeze when they think about sex." ...
Strongylocentrotus Droebachiensis - Anatomy - Internal Anatomy - Nervous System
... In the nervous system of sea urchins the spines, podia, and pedicellariae all act as sensors ... inside of the test parallel to the lateral canals of the water vascular system ...
Nervous System - Pathology
... Main article Neurology See also Psychiatry The central nervous system is protected by major physical and chemical barriers ...

Famous quotes containing the words nervous system, system and/or nervous:

    A car can massage organs which no masseur can reach. It is the one remedy for the disorders of the great sympathetic nervous system.
    Jean Cocteau (1889–1963)

    Whoever places his trust into a system will soon be without a home. While you are building your third story, the two lower ones have already been dismantled.
    Franz Grillparzer (1791–1872)

    TRUE!—nervous—very, very dreadfully nervous I had been and am; but why will you say that I am mad?
    Edgar Allan Poe (1809–1849)