Knowra Duodenum Duodenum The duodenum is the first and shortest section of the small intestine, connecting the stomach to the jejunum. It receives bile and pancreatic secretions that help digest food.
Pylorus : The muscular outlet of the stomach that regulates passage of stomach contents into the duodenum. It controls the entry of acidic chyme into the duodenum.
Stomach : A muscular organ that stores food and mixes it with acid and digestive enzymes. The stomach empties its contents into the duodenum.
Duodenal ulcer : An open sore in the lining of the duodenum, commonly associated with Helicobacter pylori infection or nonsteroidal anti-inflammatory drugs. This ulcer develops in the duodenal lining, often near the stomach outlet.
Gastric acid : The hydrochloric-acid-containing secretion produced by the stomach to aid digestion and limit microbes. The duodenum receives this acidic fluid and must buffer it.
Bile : A liver-produced digestive fluid that helps disperse dietary fats and carries waste products for excretion. Bile enters the duodenum to aid fat digestion.
Small intestine : The digestive tract section between the stomach and large intestine, comprising the duodenum, jejunum, and ileum. The duodenum is its first of three sections.
Celiac disease : An immune-mediated disorder in which gluten ingestion damages the small-intestinal lining in susceptible people. Celiac injury can affect the duodenum, where diagnostic biopsies are commonly taken.
Large intestine : The final major section of the digestive tract, which absorbs water and forms stool. Unlike the duodenum, it primarily processes material after small-intestinal digestion.
Pancreatic juice : A secretion containing digestive enzymes and bicarbonate, released by the pancreas into the small intestine. Its enzymes digest food while bicarbonate helps neutralize incoming stomach acid.
Jejunum : The middle section of the small intestine, lying between the duodenum and ileum. It follows the duodenum and continues digestion and nutrient absorption.
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