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Krist Hausken

Why rats can't vomit - 1 views

www.ratbehavior.org/vomit.htm

Rat Stomach Esophagus Corpus Forestomach Limiting Ridge

shared by Krist Hausken on 06 Oct 10 - No Cached
    • Krist Hausken
      Krist Hausken on 06 Oct 10
       
      Rats + Humans: Crural sling, LES Rats + Pigeons: "Crop" or "Forestomach", same purpose
  • When the crural sling contracts it pinches the esophagus closed
  • Forestomach: thin-walled, non-glandular section that receives the esophagus and serves as a holding chamber for food
  • ...6 more annotations...
  • Corpus: thick-walled, glandular section. Its walls have secretory glands that produce digestive enzymes and mucus. Digestion begins in the corpus. The pyloric sphincter controls the movement of food from the corpus to the intestines (specifically, the duodenum).
  • Diagram of the rat's stomach. Adapted from Moore 2000
  • The forestomach and the corpus are separated by a low fold of tissue called the limiting ridge
  • At the esophagus, the course of the limiting ridge bends into a U-shape and almost surrounds the esophageal opening
  • The esophagus is closed off from the stomach by the gastroesophageal barrier, which consists of the crural sling, the lower esophageal sphincter, and the several centimeters of intraabdominal esophagus that lie between them
  • Humans also have a crural sling and an esophageal sphincter, but ours are placed right on top of one another
suwhitte

© The American Physiological Society - 1 views

www.the-aps.org/index.htm

physiology human comparative

shared by suwhitte on 09 Sep 10 - Cached
  • suwhitte on 09 Sep 10
     
    This is the official website of the American Physiological Society.
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