The gastroduodenal junction is the boundary between the pyloric stomach (left) and the duodenum (right) of the small intestine. The pyloric sphincter controls the passage of chyme from the stomach into the duodenum.

The gastroduodenal junction is the point where the distal stomach (pyloric) joins the proximal duodenum of the small intestine. The pyloric sphincter controls the passage of partially digested food (i.e., chyme) from the stomach into the duodenum. The small intestine is involved in the continued digestion of food and the absorption of nutrients.

2025年1月16日 · It begins at the gastroduodenal junction and ends at the duodenojejunal junction. For description, the duodenum is divided into four parts – first, second, third, and fourth. These parts may also be called as superior, descending, horizontal, and …

2021年11月2日 · Contiguous regions along the mammalian gastrointestinal tract, from the esophagus to the rectum, serve distinct digestive functions. Some organs, such as the esophagus and glandular stomach or the small bowel and colon, are separated by sharp boundaries.

In the gastroduodenal junction, there is an abrupt transition in mucosal morphology. The smooth surface of the gastric pylorus is distinct from that of the duodenum which contains numerous finger-like projections called villi.

Three histologically distinct types of normal duodenal mucosa were found at this junction. These were termed antral type duodenal mucosa, transitional type duodenal mucosa (which is also referred to as gastric surface epithelial metaplasia), and jejunal type duodenal mucosa.

2025年2月20日 · The gastroduodenal junction is uniquely capable of regulating digestive functions in the gastrointestinal system. The pyloric sphincter, which demarcates the stomach from the small intestine, acts as a mechanical and electrical barrier, isolating each organ, thus enabling independent behaviors that are critical for proper digestion.

It is formed from the circular (middle) layer of smooth muscle in the muscularis externa. When it is relaxed, partially digested food (i.e., chyme) passes from the stomach into the small intestine. When it is contracted, it prevents this from happening.

2015年5月16日 · The gastroesophageal junction generally lies to the left of the 10th thoracic vertebral body, 1 to 2 cm below the diaphragmatic hiatus. The gastroduodenal junction lies at L1 and generally to the right of the midline in the recumbent fasted individual.

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