1 / 8

The Intestines

The Intestines. p. 461-467, 474-478. Small Intestine Anatomy. Pyloric sphincter Duodenum Jejunum Ileum Ileocecal valve Coils attached to mesentery. Small Intestine Functions. Completes chemical digestion Absorbs nutrients & H 2 O

adonis
Télécharger la présentation

The Intestines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Intestines p. 461-467, 474-478

  2. Small Intestine Anatomy • Pyloric sphincter • Duodenum • Jejunum • Ileum • Ileocecal valve • Coils attached to mesentery

  3. Small Intestine Functions • Completes chemical digestion • Absorbs nutrients & H2O • Huge surface area (villi & microvilli in jejunum & ileum)

  4. Sm. Intestinal Secretions • Goblet cells– mucus • Intestinal glands – secrete “brush border enzymes” to digest: • Carbs  monosacch. • Proteins  AA’s • Duodenum also receives secretions of liver (via bile duct) & pancreas (via pancreatic ducts)

  5. Nutrient Absorption • Huge surface area • Circular folds, villi, microvilli • Absorption  capillary beds, lacteals • Peyer’s patches – keep bacteria out of bloodstream

  6. Large Intestine Anatomy • Haustra • Ileocecal valve • Cecum • Appendix • Colon • Ascending • Transverse • Descending • Sigmoid • Rectum • Anal canal

  7. Large Intestine Functions • No digestive function • Goblet cells – mucus • Beneficial bacteria – make vitamins we can use (K, some B) and gas • Absorbs water, some vitamins, & electrolytes – but no villi • Elimination of feces

More Related