Human intestine and its anatomy
The human intestine is part of the gastrointestinal tract andbegins at the pylorus of the stomach and ends with a posterior opening. In such an organ there is a thorough digestion of food and absorption of all its elements. It is also worth noting that the intestinal organ plays a huge role in the body's immune system.
Where is the human intestine? The organ represented is located in the abdominal region (in its lower part) and occupies its most part. As is known, the total length of the human intestine is about four meters (during life) and about 500-800 centimeters after death. In newborns, the length of this organ varies from 340 centimeters to 360. At the end of the first year of life, it increases by about 50% and exceeds the growth of the child by 6-7 times.
Anatomy of the human intestine
The position, form and structure of this bodychange in the process of growing up. The greatest intensity of its growth is observed in the period from the 1st to the 3rd years. This is due to the fact that the child is gradually moving to a mixed common meal.
Anatomically the human intestine is divided into the following departments:
In turn, the human small intestine is divided into the following segments:
The large intestine is the lower end partthe digestive tract. It absorbs the incoming fluid and forms feces from chyme. This name was given to this intestine by the fact that its walls are much thicker than the walls of the previous department. It should be noted that this strength was obtained by the muscular layer and connective tissue. The diameter of the large intestine and its internal lumen (cavity) also exceed the size of the small intestine.
The human colon is divided into the following segments:
- blind with appendix (appendix);
- colon with separate sub-departments;
- colon ascending colon;
- transverse colon;
- colonic descending bowel;
- Straight with a wide part, ampoule, and narrowing terminal - an anal canal, which ends with the anus.
The sizes of the main parts of the intestine
The length of the small intestine varies between 160-430centimeters. As a rule, in women, this organ is somewhat shorter. The diameter of such an organ is 30-50 millimeters. The length of the large intestine fluctuates around 1.4-1.6 meters. Its diameter in the initial section is 7-10 centimeters, and in the caudal diameter it is 4-6.
The mucosa of such an organ isa multiple outgrowths-villi, which protrude into the cavity of the intestine. One square millimeter of the intestinal surface accounts for approximately 20-40 villi.</ p>>