Definitions for nervous system
ner·vous sys·tem

Princeton's WordNetRate this definition:5.0 / 1 vote

1. nervous system, systema nervosumnoun

   the sensory and control apparatus consisting of a network of nerve cells

WiktionaryRate this definition:0.0 / 0 votes

1. nervous systemnoun

   An organ system that coordinates the activities of muscles, monitors organs, constructs and processes data received from the senses and initiates actions.

WikipediaRate this definition:0.0 / 0 votes

1. Nervous system

   The nervous system is the part of an animal that coordinates its actions by transmitting signals to and from different parts of its body. The nervous system detects environmental changes that impact the body, then works in tandem with the endocrine system to respond to such events. Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. In vertebrates it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body. Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent. Spinal nerves serve both functions and are called mixed nerves. The PNS is divided into three separate subsystems, the somatic, autonomic, and enteric nervous systems. Somatic nerves mediate voluntary movement. The autonomic nervous system is further subdivided into the sympathetic and the parasympathetic nervous systems. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The enteric nervous system functions to control the gastrointestinal system. Both autonomic and enteric nervous systems function involuntarily. Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves. At the cellular level, the nervous system is defined by the presence of a special type of cell, called the neuron, also known as a "nerve cell". Neurons have special structures that allow them to send signals rapidly and precisely to other cells. They send these signals in the form of electrochemical waves traveling along thin fibers called axons, which cause chemicals called neurotransmitters to be released at junctions called synapses. A cell that receives a synaptic signal from a neuron may be excited, inhibited, or otherwise modulated. The connections between neurons can form neural pathways, neural circuits, and larger networks that generate an organism's perception of the world and determine its behavior. Along with neurons, the nervous system contains other specialized cells called glial cells (or simply glia), which provide structural and metabolic support. Nervous systems are found in most multicellular animals, but vary greatly in complexity. The only multicellular animals that have no nervous system at all are sponges, placozoans, and mesozoans, which have very simple body plans. The nervous systems of the radially symmetric organisms ctenophores (comb jellies) and cnidarians (which include anemones, hydras, corals and jellyfish) consist of a diffuse nerve net. All other animal species, with the exception of a few types of worm, have a nervous system containing a brain, a central cord (or two cords running in parallel), and nerves radiating from the brain and central cord. The size of the nervous system ranges from a few hundred cells in the simplest worms, to around 300 billion cells in African elephants.The central nervous system functions to send signals from one cell to others, or from one part of the body to others and to receive feedback. Malfunction of the nervous system can occur as a result of genetic defects, physical damage due to trauma or toxicity, infection or simply of ageing. The medical specialty of neurology studies disorders of the nervous system and looks for interventions that can prevent or treat them. In the peripheral nervous system, the most common problem is the failure of nerve conduction, which can be due to different causes including diabetic neuropathy and demyelinating disorders such as multiple sclerosis and amyotrophic lateral sclerosis. Neuroscience is the field of science that focuses on the study of the nervous system.

ChatGPTRate this definition:0.0 / 0 votes

1. nervous system

   The nervous system is a complex network of nerves and cells, known as neurons, in an organism's body that coordinates actions and sensory information by transmitting signals to and from different parts of the body. It comprises the central nervous system (the brain and spinal cord) and the peripheral nervous system (nerves outside the brain and spinal cord). It is primarily responsible for regulating and controlling bodily functions and activities, processing information, and enabling response to stimuli.

WikidataRate this definition:0.0 / 0 votes

1. Nervous system

   The nervous system is the part of an animal's body that coordinates the voluntary and involuntary 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 and the peripheral nervous system. 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 autonomic 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. At the cellular level, the nervous system is defined by the presence of a special type of cell, called the neuron, also known as a "nerve cell". Neurons have special structures that allow them to send signals rapidly and precisely to other cells. They send these signals in the form of electrochemical waves traveling along thin fibers called axons, which cause chemicals called neurotransmitters to be released at junctions called synapses. A cell that receives a synaptic signal from a neuron may be excited, inhibited, or otherwise modulated. The connections between neurons form neural circuits that generate an organism's perception of the world and determine its behavior. Along with neurons, the nervous system contains other specialized cells called glial cells, which provide structural and metabolic support.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Nervous System

   The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part, the cranial and spinal nerves, autonomic ganglia, and plexuses. (Stedman, 26th ed)

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How to pronounce nervous system?

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How to say nervous system in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of nervous system in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of nervous system in Pythagorean Numerology is: 8

Examples of nervous system in a Sentence

1. Sherry Chou:

   Right now, we actually don't know enough to say definitely how Covid-19 affects the brain and nervous system, until we can answer some of the most fundamental questions, it would be too early to speculate on treatments.

2. Alex Viada:

   That just wipes you out, less intense work builds your endurance, gives you adaptations that help improve your heart, nervous system, and circulatory system function, and allows you to recover from intense workouts. It’s much more sustainable than intense work.

3. Charles H. Mayo:

   Worry affects the circulation, the heart, the glands, the whole nervous system. I have never known a man who died from overwork, but many who died from doubt.

4. Emma Ross:

   We adapted the central nervous system to be OK with not stopping exercise at those( normal) levels, to be more tolerant of high intensity, in an untrained person the system is quite conservative but shifts as you train.

5. Cynthia Ackrill:

   The mechanism of stress is that we get worked up over something so our sympathetic nervous system revs everything up. We need our heart pumping fast to keep our blood pressure up so that we've got good circulation and we can get away from the danger.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=nervous system
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Nervous_System
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Nervous_System
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=nervous system