It is here that the body takes everything from food, well, almost everything.Here there is a thorough and deliberate chemical treatment of various nutrients.It is solved by learning whether eaten.Guess what this place is so unusual?Yes, such a role in our body is played by the small intestine.
Acidic and machining of food the stomach, the latter enters the small intestine.And the processes taking place here - more subtle.Here the body in different ways, "tolerate" the blood minerals, fats, vitamins, carbohydrates and, of course, squirrels.If a person is seriously ill on the part of the small intestine, the body is actually constantly hungry.Well, that such diagnoses do not occur very often.
small intestine is not very long.On average, a total of 6 meters.The total area of the tube is not so great.How to be a body, because here you need to learn about it?Output - the special structure of the small intestine: on the surface of it - a truly huge number of microscopic wrinkles, it greatly increases the overall surface, which is important for the absorption of nutrients (as scientists call the nutrients in general).But this is not all.Once the inner surface of the small intestine are villi.And to them - even finer structures - microvilli.The villi has blood vessels and lymph flasks in which and do many nutrients.
cells lining the inner surface adapted to suction split food molecules.Fats enter the lymphatic system, all other substance - blood.Then - in the liver, which regulates food intake of sugar in blood.
human small intestine is not something fixed, it is in the structure of the wall of the muscular layer, and because it is constantly moving rhythmically.This process is called peristalsis.In general, it is very slow.When this happens (a similar process in small waves) villi are set in motion, which also increases the amount of contact with the food molecules.On the surface of the intestine have special recess - the crypt, they open up a variety of small streams of digestive glands.All the intestine - is very reasonable and it is difficult organized system.It has its own mechanisms of regulation, for example, certain substances secreted by one area, stimulate the areas in which food gets on.
As part of the small intestine are three divisions: first, the duodenum, and secondly, skinny and, thirdly, the ileum.Immediately after the stomach the food becomes very acidic, which may be unfavorable to the other departments, which to this Ph not adapted.What your body in this situation?Of course, distinguish alkali.That is what Brunner's gland.Neutralization reaction occurs - and the acid gastric not cause ulcers in the intestines.The jejunum proper digestion processes are completed, this helps enzymes wall.
Why is the small intestine known as precisely as is called?The point of its diameter, as compared with its large intestine 3-4 cm - rather modest figure.Thick 3 times larger, but it is such a structure enables the small intestine to carry out their delicate work - to absorb nutrients.Already at the end of it, ileum, substances practically not absorbed bile only partially returned to the liver through the bloodstream through the intestinal wall.And in the large intestine can "afford" any amount - for the absorption of water is enough.
As you can see, small intestine - it is very difficult arranged body, on which the most direct health.It depends on it, we have strong, smart and beautiful, or not to be.Therefore, we must pay attention to the health of the intestine and in time to be treated, if necessary.
