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en.wikipedia.org/wiki/Parasympathetic_nervous_system

The parasympathetic nervous system (PSNS) is one of the two divisions of the autonomic nervous system (a division of the peripheral nervous system (PNS)), the other being the sympathetic nervous system. (The enteric nervous system (ENS) is now usually referred to as separate from the autonomic nervous system since it has its own independent reflex activity.)

www.diffen.com/.../Parasympathetic_nervous_system_vs_Sympathetic_nervous_system

The parasympathetic nervous system (PNS) controls homeostasis and the body at rest and is responsible for the body's "rest and digest" function. The sympathetic nervous system (SNS) controls the body's responses to a perceived threat and is responsible for the "fight or flight" response. The PNS and ...

www.medicinenet.com/script/main/art.asp?articlekey=4770

Parasympathetic nervous system: The part of the involuntary nervous system that serves to slow the heart rate, increase intestinal and glandular activity, and relax the sphincter muscles. The parasympathetic nervous system, together with the sympathetic nervous system, constitutes the autonomic nervous system.

www.differencebetween.com/difference-between-sympathetic-and-vs...

The key difference between sympathetic and parasympathetic nervous system is that the sympathetic nervous system is responsible for controlling the body’s responses to perceived harm and the mobilizing the “fight or flight” response while the parasympathetic nervous system is responsible for controlling the homeostasis and the body’s “rest-and-digest” response.

www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0025459

The parasympathetic nervous system is responsible for bodily functions when we are at rest: it stimulates digestion, activates various metabolic processes and helps us to relax. But the sympathetic and parasympathetic nervous systems do not always work in opposite directions; they sometimes complement each other too.

www.sciencedaily.com/terms/parasympathetic_nervous_system.htm

The parasympathetic nervous system is one of three divisions of the autonomic nervous system. Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows ...

www.britannica.com/science/parasympathetic-nervous-system

Parasympathetic nervous system: Parasympathetic nervous system, division of the nervous system that modulates visceral organs such as glands. While providing important control of many tissues, the parasympathetic system is not crucial for the maintenance of life—unlike the sympathetic system, which activates the fight-or-flight response.

biologydictionary.net/parasympathetic-nervous-system

Parasympathetic Nervous System Definition. The parasympathetic nervous system, or PSNS, is part of the nervous system.The nervous system sends signals to and from different body parts via nerves. The PSNS is responsible for all the bodily activities that take place when an animal is at rest.

www.sciencedirect.com/topics/neuroscience/parasympathetic-nervous-system

The parasympathetic nervous system is composed mainly of the cranial and sacral spinal nerves. The preganglionic neurons, arising from either the brain or sacral spinal cord, synapse with just a few postganglionic neurons which are located in or near the effector organ (muscle or gland).

bodytomy.com/sympathetic-parasympathetic

The parasympathetic nervous system is a division of the autonomic nervous system. This is a part of the autonomic nervous system that is responsible for the 'rest and digest' phase of the body. The nerves of this system send fibers to cardiac muscles, smooth muscles, and to the glandular tissue.