Chapter 5 Digestive System Continued

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Chapter 5 Digestive System Continued
2010-09-11 23:37:59
Digestive System Continued

Digestive System Continued
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  1. Small intestine (small bowel)
    extends 20 feet from the pyloric sphincter to the 1st part of the large intestine; has three parts: the duodenum, jejunum, and the ileum
  2. duodenum
    only 1 foot longand receives food from the stomach as well as bile from the liver and gallbladder and pancreatic juice from the pancreas
  3. jejunum
    the second part of the small intestine about 8 feet long
  4. the ileum
    the third section that's about 11 feet long and attaches to the first part of the large intestine
  5. fundus and body
    resevoir for ingested food and an area for action by acid and pepsin
  6. antrum
    muscular grinding chamber that breaks up food and feeds it gradually into the duodenum
  7. Large intestine
    extends from the end of the ileum to the anus and has three components: the cecum, the colon, and the rectum
  8. cecum
    pouch on the right side that connects the ileum at the ileocecal valve (sphincter)
  9. appendix
    hangs from the cecum, no clear purpose, and can become inflamed and infected when in is clogged or blocked.
  10. colon
    five feet long and has four named segments: ascending, descending, transverse, and sigmoid
  11. ascending colon
    extends from the cecum to the undersurface of the liver, where it goes left to become a transverse colon
  12. transverse colon
    passes horizontally to the left toward the spleen and then turns downward into the descending colon
  13. sigmoid colon
    shaped like an S and begins at the distal end of the descending colon and leads into the rectum
  14. anus
    the lower opening of the gastrointestinal tract
  15. feces
  16. defecation
    the expulsion or passage of stools from the body through the butt