Duodenum-Jejunal Flexure

The duodenum (DU) is one of the sections of the small intestine and is located in the abdominal cavity at the level of the transverse processes of the thoracic vertebrae and the upper edge of the liver. The duodenum connects to the stomach and forms with it the duodenal-gastric flexure (flexura gastroduodenalis). The duodenum continues into the jejunum, where it forms the duodenum-iliac flexure (flexura ileocecalis). Between these two flexures is the duodenojejunal (or duodenojejunal) flexure.

The duodenojejunal flexure is an arched curve that connects the duodenum to the jejunum. This curve is about 6-7 cm long and is located at the level of the third lumbar vertebra. It plays an important role in digestion, as food passes from the duodenum to the jejunum here.

A number of important processes occur in the duodenum-jejunal flexure. Firstly, here food is exposed to pancreatic enzymes and bile, which are secreted in the duodenum. These enzymes play an important role in the breakdown of proteins, fats and carbohydrates. Secondly, in the duodenum-jejunal flexure, food is mixed with intestinal contents, which contributes to its faster and more efficient digestion.

In addition, the duodenojejunal flexure is the site where absorption of nutrients from the intestine occurs. Here the reabsorption of water and electrolytes occurs, which ensures the maintenance of the body's water balance.

Thus, the duodenum-jejunal flexure plays an important role in the process of digestion and maintaining homeostasis of the body. However, in some diseases, for example, peptic ulcer, duodenal or pancreatic, this bend can be involved in the pathological process and lead to serious complications.

The duodenum-jejunum (pyloric-transverse) bend is a natural bend of the jejunum (section of the small intestine), formed from its transition to the right side of the body to the level of the bend of the duodenum, when it approaches the pylorus of the stomach.

The duodenum and jejunum, as well as the stomach, are connected to each other at the bend of the duodenum in the left corner of the abdominal cavity, which is called the Cardinal break.

In the left half of the abdominal cavity, digestion begins in the cardiac section of the stomach; it has a length of about 2.5 cm. The cardial section is connected to the esophagus through a narrowed opening - the cardiac canal 5-6 mm wide, lined with cylindrical ciliated epithelium. From here, food enters the stomach through the cardia, which is connected to the esophagus using the semilunar fold - the lesser curvature. At the very beginning of the Little Cree