Digestive person performing one of the most important functions of his physiology - eat, convert it into energy, release nutrients and remove waste life of the organism.Note that all these functions are intertwined with the functioning of other organ systems that work smoothly.For example, during digestion bodies play an important role human circulatory system - they are richly equipped with all the digestive system.After all the blood gets food substances and carries them throughout the body.
Digestive person can be divided into two types - primary and secondary.The main are those that are directly related to the reception, the digestion of food and the withdrawal from the body.Auxiliary are gland (salivary and pancreatic), liver, gall bladder.These bodies secrete digestive enzymes such person, without which the digestion process would be impossible.
structure of human digestion is extremely difficult, due to their functions.Digestive system begins with the mouth - here is the primary mechanical processing of food and highlight the teeth by saliva.Saliva isolated parotid, sublingual and submandibular salivary glands.By using enzymes, which are contained in the saliva, the food begins to be digested in the mouth - the so-called initial hydrolysis process of digesting carbohydrates.Next the food enters the throat, and then into the esophagus.The esophagus is a long tube that is connected at the input with the stomach-muscle gatekeeper that prevents to throw the food back into the esophagus.Normally this area is still underdeveloped in children who frequently vomit fountain at reflux.
Once in the stomach, food passes the next stage of digestion.There is hydrolyzed proteins and fat partially.To make the process of digestion was qualitatively and in full, the stomach wall secrete specific cleaving enzymes, such as hydrochloric acid, etc.In addition to the stomach, the enzymes selected and the auxiliary gland - pancreas.After the food has passed the necessary processing in the stomach, it passes into the intestine.
small intestine - another body which digests food.The duodenum receives food directly from the stomach and this is where the bulk of the processed fat digested gallbladder passage which opens into the duodenum.
small intestine food supplies further, all the while treating her chyme - a special substance.The final stage of digestion digestive substances occurs in the cell membranes of the small intestine - enterocytes.There are absorbed into the blood oligosaccharides, amino acids, monosaccharides, fatty acid.Remains of food that were not able to digest pass into the large intestine.But absorption and cleavage in the colon hardly occurs, but the food is largely freed from water.Slowly digested food turns into feces.At the time of approach to zhomu - thick circular muscle pushes outward through the feces of the sphincter - weight puts pressure on the intestinal wall and causes a feeling of defecation.
Digestive person - an amazing system, but at the same time and the most vulnerable.Mmnogoe depends on which food is digested.Unfortunately, the inhabitants of the cities due to its employment often move on to fast foods, delicious (due flavors), but absolutely useless and sometimes harmful food.Even the ancient Greeks - the sages recognized - said: "We - what we eat," stressing the importance of food in human life.Above this is worth considering ...
