digestive system provides a human activity by delivering essential nutrients used as an energy source and building material.These substances enter the body through the digestive tract, a total length of about 10 meters and having throughout the expansion and contraction of the cavity.
structure of the human digestive system includes the mouth, pharynx, esophagus, stomach, pancreas, liver, gall bladder, large and small intestines.
mouth.In this part of the digestive system is directly sampling the food, its exposure to chemical and physical effects.Chewing food is of the second type of impact, and from this initial phase of the system depends on the quality of earnings and the assimilation of nutrients.Not without reason, many experts advise how to chew food, which is then exposed to saliva is formed in the bolus.
Spit assigned fairly important role in the process of digestion.It consists almost entirely of water (about 99%).Protein contained therein mucin contributes tack, the presence of lysozyme allows decontamination of food and enzymes such as amylase and maltase digested nutrients.
anatomy of the digestive system indicates that the following bodies is the oral pharynx, which is a muscular organ with some holes (mouth opening, nose entryway, into the esophagus and throat and two tubes of the middle ear).Exposure, due to falling food the way of breathing, the entrance to the larynx is covered by the epiglottis.
The process of swallowing food is due to the contraction of the muscles of the pharynx, through which it enters the esophagus and through the diaphragm - the stomach.Since the esophagus - a muscular tube that by reducing these muscles food is pushed on.
The digestive system includes the stomach, which is located below the diaphragm in the upper abdomen.Nature there are two holes - input and output.The second closed strong enough obturator muscle (sphincter).Food is retained in the stomach for a long time (up to 11 hours), where it undergoes chemical action of gastric juice, which is a colorless liquid containing hydrochloric acid.It is through this component is directly performed digestive function.The acid is also detrimental effect on the ingested bacteria.Therefore, in case of diseases of the gastrointestinal tract is a risk of transmission of infectious diseases that are transmitted through the digestive system.
resulting chyme from the stomach through a sphincter portions gradually enters the intestine.Small intestine starts from duodenum into which open common bile duct and the pancreatic duct.Here comes the end of the digestion of food by the action of pancreatic juice and bile.
from the small intestine processed foods gradually passes into the large intestine, which has a length of 2 meters.There rapidly absorbed water, and the remnants of unnecessary food already eliminated from the body.Due to the large number of different bacteria in the gut, improved digestion.However, there are negative aspects.Thus, under the action of the microorganisms are destroyed already unnecessary food and toxic compounds which are responsible for the removal of the liver.
Digestive system liver removes one of the dominant roles.After all, this is the biggest digestive gland, through which the cleaned and whole venous blood from the stomach, spleen and intestines.
Thus, the digestive system - a rather complex system of food processing in the human body, each body which have a role, and failure of at least one component of this mechanism may develop gastrointestinal disease.
