parasümpaatilised

Parasümpaatilised refers to the parasympathetic nervous system, a major division of the autonomic nervous system. This system is responsible for the body's "rest and digest" functions, contrasting with the sympathetic nervous system's "fight or flight" response. When the parasympathetic nervous system is active, it promotes relaxation and conserves energy.

Key functions of the parasympathetic nervous system include slowing the heart rate, reducing blood pressure, increasing digestive activity, and constricting the pupils. It also plays a role in stimulating the release of saliva and digestive enzymes, as well as promoting urination and defecation. The primary neurotransmitter of the parasympathetic nervous system is acetylcholine.

The parasympathetic nervous system originates from the brainstem and the sacral region of the spinal cord. Nerves from these areas extend to various organs throughout the body, including the heart, lungs, stomach, intestines, and eyes. Its activation is crucial for maintaining homeostasis and recovery after periods of stress or exertion. Disorders affecting the parasympathetic nervous system can lead to a range of health issues, impacting functions such as digestion, heart rate regulation, and bladder control.