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Notes: Small and Large Intestines              (pg 8)
Small Intestine• 2.5 cm in diameter and 6 meters long
Small Intestine• 2.5 cm in diameter and 6 meters long• Functions: Finishes process of digestion,  absorbs nutrients, passe...
Small Intestine• 2.5 cm in diameter and 6 meters long• Functions: Finishes process of digestion,  absorbs nutrients, passe...
Output (pg 9)• Paste in small intestine diagram. Label and use  arrows to show the direction chyme travels
Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds
Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds• Villi...
Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds• Villi...
Output (pg 9)• Draw cross section of small intestine wall
Secretions of the Small Intestine (pg 8)Enzymes• Peptidase: breaks down proteins• Maltase, Sucrase, Lactase: break disacch...
Secretions of the Small IntestineEnzymes• Peptidase: breaks down proteins• Maltase, Sucrase, Lactase: break disaccharides ...
Large Intestine• Larger in diameter, but only 1.5 meters long
Large Intestine• Larger in diameter, but only 1.5 meters long• No villi
Large Intestine• Larger in diameter, but only 1.5 meters long• No villi• Series of pouches called haustra
Large Intestine•   Larger in diameter, but only 1.5 meters long•   No villi•    Series of pouches called haustra•   Functi...
Large Intestine• Larger in diameter, but only 1.5 meters long• No villi•  Series of pouches called haustra• Functions: Abs...
Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly  from the ileocecal junction (where small and  ...
Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly  from the ileocecal junction (where small and  ...
Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly  from the ileocecal junction (where small and  ...
Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly  from the ileocecal junction (where small and  ...
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Notes small and large intestines

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  1. 1. Notes: Small and Large Intestines (pg 8)
  2. 2. Small Intestine• 2.5 cm in diameter and 6 meters long
  3. 3. Small Intestine• 2.5 cm in diameter and 6 meters long• Functions: Finishes process of digestion, absorbs nutrients, passes residue to large intestine
  4. 4. Small Intestine• 2.5 cm in diameter and 6 meters long• Functions: Finishes process of digestion, absorbs nutrients, passes residue to large intestine• Regions: Duodenum (25 cm), Jejunum (2.5 meters), Ileum (3.5 meters)
  5. 5. Output (pg 9)• Paste in small intestine diagram. Label and use arrows to show the direction chyme travels
  6. 6. Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds
  7. 7. Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds• Villi: Finger-like extensions. Villi contain numerous blood and lymph capillaries
  8. 8. Structure of Small Intestine (pg 8)Surface area greatly increased by presence of:• Plicaecirculares: Circular folds• Villi: Finger-like extensions. Villi contain numerous blood and lymph capillaries• Microvilli: tiny hair-like extensions of the cell membrane of the epithelial cells. “Brush border”
  9. 9. Output (pg 9)• Draw cross section of small intestine wall
  10. 10. Secretions of the Small Intestine (pg 8)Enzymes• Peptidase: breaks down proteins• Maltase, Sucrase, Lactase: break disaccharides into monosaccharides• Lipase: breaks down fats
  11. 11. Secretions of the Small IntestineEnzymes• Peptidase: breaks down proteins• Maltase, Sucrase, Lactase: break disaccharides into monosaccharides• Lipase: breaks down fatsHormones• Secretin: Stimulates pancreas to secrete bicarbonate (neutralizes chyme)• Cholecystokinin: Stimulates release of bile from gall bladder and digestive enzymes from pancreas
  12. 12. Large Intestine• Larger in diameter, but only 1.5 meters long
  13. 13. Large Intestine• Larger in diameter, but only 1.5 meters long• No villi
  14. 14. Large Intestine• Larger in diameter, but only 1.5 meters long• No villi• Series of pouches called haustra
  15. 15. Large Intestine• Larger in diameter, but only 1.5 meters long• No villi• Series of pouches called haustra• Functions: Absorption of fluids and electrolytes, elimination of solid wastes
  16. 16. Large Intestine• Larger in diameter, but only 1.5 meters long• No villi• Series of pouches called haustra• Functions: Absorption of fluids and electrolytes, elimination of solid wastes• Only secretion is mucus
  17. 17. Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly from the ileocecal junction (where small and large intestines meet). Appendix is attached
  18. 18. Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly from the ileocecal junction (where small and large intestines meet). Appendix is attached• Colon: Main portion. Divided into ascending, transverse, descending, and sigmoid portions
  19. 19. Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly from the ileocecal junction (where small and large intestines meet). Appendix is attached• Colon: Main portion. Divided into ascending, transverse, descending, and sigmoid portions• Rectum: Stores feces
  20. 20. Regions of the Large Intestine• Cecum: blind pouch that extends inferiorly from the ileocecal junction (where small and large intestines meet). Appendix is attached• Colon: Main portion. Divided into ascending, transverse, descending, and sigmoid portions• Rectum: Stores feces• Anal canal: Contains internal and external sphincters
  21. 21. Colonoscopy Video!
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