| The nervous system refers to the brain, nerves, spinal cord, ganglia and other receptor organs that receive and interpret stimuli. |
All living organisms are aware of the changes occurring in their external environment, like change in light, temperature, sound, movement, and smell. When it comes to the survival of any living organism, it depends on how well they react to stimuli or changes in their environment. Faster response to stimuli means better chances of survival.
As communication from one cell to another is actually slow and insufficient for multicellular organisms, a specialized system was required to react to stimuli. This system is known as the nervous system, which could instantly transfer electrical signals from one part of the body to another.
There are two kinds of nervous systems namely – central and peripheral nervous system.
Main Article: Human Nervous System (Structure, Function & Parts)
Frequently Asked Questions on Nervous System Definition
Define the nervous system.
The nervous system refers to the brain, nerves, spinal cord, ganglia and other receptor organs that receive and interpret stimuli.
What are some common nervous system disorders?
Alzheimer’s disease, Parkinson’s disease, multiple sclerosis and epilepsy are some common nervous system disorders.
Further Reading:
- Central Nervous System – Overview, Parts, and its Functions
- Peripheral Nervous System – Definition, Parts and Functions
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