What are the different parts of the autonomic nervous system?

Responsible for the management of involuntary glands, involuntary reflexes and involuntary muscles in the body is an autonomous nervous system (ANS) an umbrella composed of three different nervous systems: a parasympathetic system, a sympathetic system and an enteric system. All three of these nervous systems rely on special autonomous neurons that regulate basic functions by supplying signals from the brain to muscles and glands that must work without conscious effort. The nerve cells of ANS, also called motor neurons, are mainly controlled by glandular secretions, digestive system organs, heart muscles and various smooth muscles. Motor neurons often take their allusions from hazards or changes in the environment, which triggers the brain to release the response signals.

Nerves in Meissen and Brain Medulle, parasympathetic division of the nervous system organizes de-stimulating the body. It works with the digestive system organs such as abdominal, liver and stomach and sensory organs such as nose and eyes to slow the heart rhythm, reduce pupils and createA gentle mood so that the gastrointestinal system can break and absorb food. The effects of the parasympathetic nervous system, which also involves relaxation of the sphincter muscles, can take until food and liquids do not penetrate the intestines and bladder for waste excretion. This part of the autonomic nervous system is often referred to as the "rest and digest" system.

designed to stimulate the body at the moment of excitement, aggression or fear, the function of the sympathetic division of the nervous system is the opposite of the parasympathetic system. The sympathetic nervous system, controlled neurons in the lumbar section and the thoracic part of the spinal cord cause a rapid rhythm of the heart, reduced digestion and increased blood pressure. Normally the Calnca system led a part of the "flight or fight" of the autonomic nervous system, relies on the release of chemicals such as norepinephrine and acetylcholine to send the body to an increased and hyperactive state.

the enteric part of the autonomic nervous system is often called the internal nervous system and exclusively ensures the digestive system where it is completely located. Neurons are used in the membranes of esophagus, intestines, pancreas and other gastrointestinal organs, the enteric nervous system provides help with digestive functions that are handled by the parasympathetic part of the nervous system while providing digestive defense for the body. Defensive digestive functions of the enteric system include triggering vomiting or diarrhea when harmful bacteria or viruses have entered into the digestive tract and must be excluded. The enteric part of the autonomic nervous system also controls the amount of blood flowing into the digestive area and how to assemble the abdominal muscles to move the food through the digestive tract.