Pylorus
| 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 (
/paɪˈlɔərəs/ or /pɨˈlɔərəs/; from the Greek πυλωρός, "gate guard") is the region of the stomach that connects to the duodenum (the beginning of the small intestines). It is divided into 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 which lets food pass from the stomach to the duodenum. It receives sympathetic innervation from the celiac ganglion.
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[edit] Medical significance
One medical condition associated with the pylorus is pyloric stenosis.[1] 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."
[edit] Gallery
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The longitudinal and circular muscular fibers of the stomach, viewed from above and in front.
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The oblique muscular fibers of the stomach, viewed from above and in front.
[edit] See also
[edit] References
[edit] 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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