| 单词 |
lower esophageal sphincter |
| 释义 |
lower esophageal sphincter
lower esophageal sphinctern. A ring of smooth muscle fibers at the junction of the esophagus and stomach. Also called cardiac sphincter, gastroesophageal sphincter.EncyclopediaSeecardialower esophageal sphincter
low·er e·soph·a·ge·al sphinc·ter (LES), musculature of the gastroesophageal junction that is tonically active except during swallowing.lower esophageal sphinctern. A ring of smooth muscle fibers at the junction of the esophagus and stomach. Also called cardiac sphincter, gastroesophageal sphincter.lower esophageal sphincter A 3-5 cm in length zone of ↑ pressure at the junction of the distal esophagus with the gastric cardia, located at the hiatus, which forms a physical barrier in preventing gastric reflux; substances that ↑ the LES tone include gastrin, acetylcholine, serotonin, PGF2 a, motilin, substance P, histamine, pancreatic polypeptidelow·er e·soph·a·ge·al sphinc·ter (LES) (lō'ěr es-ō-fa'jē-ăl sfingk'tĕr) Musculature of the gastroesophageal junction that is tonically active except during swallowing. AcronymsSeelake effect snow |
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