Sympathetic Nervous System
Sympathetic Nervous System
The Sympathetic Nervous System (pronunciation: sɪmˌpæθɪk ˈnɜːrvəs ˈsɪstəm) is a part of the Autonomic Nervous System that primarily functions to prepare the body for physical activity. It is often referred to as the "fight or flight" system.
Etymology
The term "Sympathetic Nervous System" originates from the Greek words "syn" meaning "with" and "pathos" meaning "feeling". This is due to the system's role in responding to emotional states.
Function
The Sympathetic Nervous System is responsible for the body's response to stressful situations. It increases heart rate, dilates pupils, slows digestion, and releases adrenaline among other functions. This prepares the body for a quick response to potential threats.
Related Terms
- Adrenaline: A hormone released by the Sympathetic Nervous System in response to stress.
- Autonomic Nervous System: The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.
- Parasympathetic Nervous System: The part of the Autonomic Nervous System that serves to slow the heart rate, increase intestinal and gland activity, and relax the sphincter muscles.
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