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The secretion of the stomach may occur when hitting him not only nutrients, but also foreign bodies (rubber rings, solid objects, and so on), but secretion in this case is not food, and reject. It may appear for tochechnogo status, appearance antiperistaltic movements and will be completed by vomiting.
Motor activity of the stomach provides stirring the food supply and evacuation of the contents of the stomach. For the first time after a meal of the motor activity of the stomach is weakened, but as soaking the food mass gastric juice it begins to grow and is expressed in periodic and following one after another peristaltic waves, which all more often culminate in the opening of the pyloric sphincter. As a result, small portions of stomach contents pass into the intestines. The opening of the sphincter also contributes to the irritated area sphincter side of the stomach, while irritation same acidic content sphincter from the intestines causes immediate closing of the sphincter and it remains in this state until such time as in the intestines food weight not fully neutralized.
When eating in the stomach often have large volumes of water or water can be separated from food products, as happens, for example, when stvorazhivanii in the stomach milk under the influence of the enzyme of chymosin. The presence of excessive amounts of water can dilute the gastric juice, and this can complicate the process of digestion. To prevent this in the stomach there is a special water chute, located on the small curvature on which excess water is removed in the intestines.
The contents of the stomach portions enters the duodenum, where is further digestion. It digestion is carried out under influence of enzymes of juice pancreas and intestines. The secretion of the pancreas is influenced by the nervous mechanism and specific hormone secretin, which is formed in the mucosa of the duodenum under the influence of hydrochloric acid, coming together with the contents of the stomach. In the mucosa of the duodenum also produces the hormone that affects the formation of pancreatic enzymes, - pancreozymin. The protein fragments coming from the stomach into the intestines as Peptones, subject to further digestion under the influence of the enzyme pancreatic juice - trypsin (activated by enterokinase intestinal juice)and enzyme intestinal juice - Aracena and brought to amino acids. Carbohydrates are also continuing to digest here in a slightly alkaline environment under the influence of amylase, Maltese, lactase and other enzymes intestinal juice and pancreatic juice.
Fats are digested in the gut under the influence of the enzyme lipase, intestinal juice and pancreatic juice. In the digestion and absorption of food digestion of fat takes part bile. Bile also refers to the digestive juices. She begins to stand out in the intestine through the common bile duct in 20 minutes after administration of milk and 30 - 40-50 minutes after taking the bread and meat. While biliary excretion not associated with food intake, and with the beginning of receipt of chyme from the stomach into the intestine and conditioned reflex influence from the surface of the intestine to the sphincter of the bile duct (the sphincter of Oddi) and the contraction of the gallbladder wall. The effect of bile is that it emulgelooe fats, activates the lipase and helps dissolve fatty acids.
Currently confirmed the existence in the intestines of a special, so-called wall, digestion. The essence of this process is that due to the presence of the villi, and in this regard, and the enormous surface of favourable conditions for adsorption enzymes (amylase) the intestinal wall and to enhance enzymatic reactions in this area.
In the small intestine digestion completes the process of absorption of nutrients (see Induction). As suction and further movement of the gut contents slag waste solids enter the colon; it is the absorption of water and the formation of feces. The final formation of Cala ends at the rectum, and then filling the capsules calls the appropriate irritation and the urge to defecate.