|It has been suggested that this article or section be merged into Pylorus. (Discuss)|
|Outline of stomach, showing its anatomical landmarks. (Pyloric antrum visible at left.)|
|Interior of the stomach. (Pyloric antrum visible at left.)|
|Gray's||subject #247 1162|
Pyloric antrum (antrum, lesser cul-de-sac) is the initial portion of the pyloric part of the stomach. It is near the bottom of the stomach on the left side of the pyloric sphincter, which separates the stomach and the duodenum.
It may temporarily become partially or completely shut off from the remainder of the stomach during digestion by peristaltic contraction of the prepyloric sphincter; it is demarcated, sometimes, from the second part of the pyloric part of the stomach (pyloric canal) by a slight groove.
The pyloric antrum is the location of several important endocrine cells including Gastrin-producing G Cells (stimulate acid production) and the luminal-pH-sensitive population of somatostatin producing of D cells (responsible for shutting off acid secretion. There is a second hormone-sensitive population near the fundus.)
Pylorus - lesser,
atrum - cave; cavern; hollow place with overarching foliage; cavity, hollow; tomb
- William F Ganong. "Review of Medical Physiology, 22nd Edition."
- Physiology Lecture Notes.
- Controversy over definition at plig.org
- SUNY Labs 37:06-0104 - "Abdominal Cavity: The stomach"
- SUNY Anatomy Image 7765
- Pyloric+antrum at eMedicine Dictionary
Anatomy of torso, digestive system: Gastrointestinal tract
|Upper GI: to stomach||Mouth • Pharynx (nasopharynx, oropharynx, hypopharynx) • Esophagus • Crop|
|Upper GI: stomach||rugae - gastric pits - cardia/gland - fundus/gland - pylorus/gland - pyloric antrum - pyloric canal - greater curvature - lesser curvature - angular incisure|
|Lower GI: intestines||Small intestine: Duodenum (Suspensory muscle, Major duodenal papilla, Minor duodenal papilla) • Duodenojejunal flexure • Jejunum • Ileum • continuous (intestinal villus, crypts of Lieberkühn, circular folds) Large intestine: Cecum • Colon (ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon) • continuous (taenia coli, haustra, epiploic appendix)|
|Lower GI: termination||Rectum: Houston valve • rectal ampulla • pectinate line Anus: Sphincter ani internus muscle • Sphincter ani externus muscle|
|Lower GI: lymph||GALT: Peyer's patches (M cells)|