duodenuma

The duodenum is the first part of the small intestine in the human digestive system. It is located immediately inferior to the stomach and is approximately 10-13 centimeters in length, splitting into the second part of the small intestine.

The duodenum plays a crucial role in the digestion and absorption of nutrients. It receives partially digested food from the stomach via the pyloric sphincter and secretes digestive enzymes and acids, including bicarbonate and pancreatic juice. The duodenum is also the primary site for the absorption of calcium, iron, and fat-soluble vitamins, including vitamins A, D, E, and K.

The duodenum can be divided into four sections based on its anatomical characteristics:

The first part of the duodenum has a rough outer surface and receives bile from the gallbladder and pancreatic juice from the pancreas.

The second part takes a sharp bend to the left and has a distinct hump-like structure called the major duodenal papilla.

The third part becomes more horizontal and narrow, emptying into the fourth part.

The fourth part merges into the jejunum, which is the rest of the small intestine.

Diseases affecting the duodenum include duodenal ulcers, which are a type of peptic ulcer, as well as Crohn's disease and celiac disease. Abnormalities in the duodenum can also lead to complications such as chronic pancreatitis, which is inflammation of the pancreas. A condition known as duodenojeunal flexion refers to the separation between the duodenum and the jejunum.

Treatment of duodenal issues involves addressing the underlying cause of the condition, which often requires a combination of medical and surgical interventions.