Human intestine and its anatomy

The human intestine is part of the gastrointestinal tract and begins at the pylorus of the stomach and ends with the 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 approximately 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 child's growth by 6-7 times.

Anatomy of the human intestine

The position, shape and structure of this organ change during the course of growing up. The highest intensity of its growth is observed in the period from 1 to 3 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:

• thin;
• fat.

The first department is part of the digestive system, which is located between the colon and stomach. In this organ, all the basic processes of digestion occur. By its name, the small intestine is due to the fact that its walls are less strong than the walls of the large intestine. In addition, the lumen and cavity of this organ are also much smaller.

In turn, the human small intestine is divided into the following segments:

• 12-colon;
• Lean;
• Iliac.

The large intestine is the lower end part of the digestive tract. It absorbs the incoming fluid and forms feces from chyme. This name was given to this intestine due to 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 a vermiform appendix (appendix);
• Colon with separate sub-departments;
• Colon ascending colon;
• Transverse colon;
• Colonic descending bowel;
• Sigmoid;
• Straight with a wide part, an ampoule, and a tapering terminal - an anal canal that ends with the anus.

The sizes of the main parts of the intestine

The length of the small intestine varies between 160-430 centimeters. 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 mucous membrane of such an organ is a multiple outgrowth-villi that protrude into the intestinal cavity. One square millimeter of the intestinal surface accounts for approximately 20-40 villi.