cardiac sphincter


cardiac sphincter
(ARTHROPODA: Insecta)
Circular muscles at the entrance to the midgut of certain insects; cardiac valve; stomodeal valve.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • cardiac sphincter — n the somewhat thickened muscular ring surrounding the opening between the esophagus and the stomach * * * cardioesophageal sphincter lower esophageal s …   Medical dictionary

  • cardiac sphincter — noun the valve between the distal end of the esophagus and the stomach; the physiological sphincter at the esophagogastric junction • Hypernyms: ↑physiological sphincter • Part Holonyms: ↑esophagus, ↑oesophagus, ↑gorge, ↑gullet * * * noun …   Useful english dictionary

  • Sphincter — A sphincter is an anatomical structure, or a circular muscle, that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals; there …   Wikipedia

  • sphincter — A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. SYN: musculus s. [TA], s. muscle [TA]. [G. sphinkter, a band or lace] s. of ampulla s. of hepatopancreatic ampulla. anatomic s.… …   Medical dictionary

  • Esophageal sphincter — The term esophageal sphincter refers to one of two sphincters that are part of the esophagus: lower esophageal sphincter (also called cardiac sphincter or gastroesophageal sphincter) which leads into the cardia. upper esophageal sphincter (also… …   Wikipedia

  • physiological sphincter — noun a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissue • Hypernyms: ↑sphincter, ↑anatomical sphincter, ↑sphincter muscle • Hyponyms: ↑cardiac sphincter …   Useful english dictionary

  • lower esophageal sphincter — noun The sphincter situated at the lower part of the esophagus. Syn: cardiac sphincter, gastroesophageal sphincter, esophageal sphincter …   Wiktionary

  • loweresophageal sphincter — lower esophageal sphincter n. A ring of smooth muscle fibers at the junction of the esophagus and stomach. Also called cardiac sphincter, gastroesophageal sphincter. * * * …   Universalium

  • esophageal sphincter lower — (LES) the terminal few centimeters of the esophagus, near the esophagogastric junction, which prevents reflux of gastric contents into the esophagus. Called also cardiac, cardioesophageal, or gastroesophageal s …   Medical dictionary

  • cardiacsphincter — cardiac sphincter n. See lower esophageal sphincter. * * * …   Universalium


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