The ring of muscle that controls the passage of material from the stomach into the small intestine.
Pylorus
| Medical Glossary: Pylorus |
| 5min Related Video: Pylorus |
| Wikipedia: Pylorus |
Not to be confused with Pillory.
| Pylorus | |
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| Outline of stomach, showing its anatomical landmarks. | |
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| Interior of the stomach. (Pylorus labeled at center left.) | |
| Latin | valvula pylori |
| Gray's | subject #247 1164 |
The pylorus (pronounced /paɪˈlɔrəs, pɪˈlɔrəs/; from the Greek πυλωρός, "gate guard") is the region of the stomach that connects to the duodenum. It is divided in two parts:
- the pyloric antrum, which connects to the body of the stomach.
- the pyloric canal, which connects to the duodenum.
The pyloric sphincter, or valve, is a strong ring of smooth muscle at the end of the pyloric canal and lets food pass from the stomach to the duodenum. It receives sympathetic innervation from celiac ganglion.
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Medical significance
One medical condition associated with the pylorus is pyloric stenosis. In such conditions as stomach cancer, tumours may partly block the pyloric canal. A special tube can be implanted surgically to connect the stomach to the duodenum so as to facilitate the passage of food from one to the other. This tube is called a "pyloric stent."
Gallery
 The longitudinal and circular muscular fibers of the stomach, viewed from above and in front. |
 The oblique muscular fibers of the stomach, viewed from above and in front. |
In Popular Culture
Ignatius J. Reilly, the hero of John Kennedy Toole's tragicomic tale, A Confederacy of Dunces, complains frequently about problems with his pyloric valve. [1]
References
- ^ Toole, John Kennedy (2000). A Confederacy of Dunces. Baton Rouge, La.: "Louisiana State University Press". pp. 338. ISBN 0807126063.
External links
- SUNY Labs 37:06-0105 - "Abdominal Cavity: The Stomach"
- SUNY Labs 38:07-0102 - "Stomach, Spleen and Liver: The Pylorus"
- SUNY Anatomy Image 8150
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Learn More
 | juxtapyloric |
| peripyloric |
| pylorectomy |
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