Fibers Parasympathetic Postganglionic

Parasympathetic postgangliogenic system (PPGS) fibers, also known as vagal nerves (CNX), are nerves that arise primarily from ganglia of the upper gastrointestinal and respiratory tracts, as well as various skeletal muscles and sensory organs. These nerves act on the innervation of the heart, abdominal organs, blood vessels, respiratory organs, peripheral muscles, intestines, bladder, urinary tract and some other organs. EPPS provide a parasympathetic effect on these organs and systems. They are found overwhelmingly in the covering and connective fascia of the abdomen and around the organs or organs of the abdominal cavity and internal organs. They are also found deep on the surface of the flat muscles of the anterior abdominal wall and the anterior part of the diaphragm. Some of them are found deep in the blood vessels, where they provide some parasympathetic regulation of vascular tone and blood supply, for example in the jugular vein.

Parasympathetic postganglionic fibers

Parasympathetic postganglionic fibers Parasympathetic fiber is a tissue that is part of skeletal and smooth muscles. When a muscle contracts, substances with neurotoxicity are released into the blood, which leads to its relaxation. Thanks to this, the alveoli of the lungs straighten, the arterioles open, the vessels narrow, and the pupil dilates. Under the influence of parasympa, the tone of the anal sphincter, bronchi, and stomach decreases.