USMLE

GI System

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Digestive
  1. Gastrin
  2. Pepsin
  3. Amylase
  4. Lipase
  5. Trypsin
  6. CCK
  7. Secretin
  8. GI System
  9. Ingestion
  10. Liver
  11. Bile
  12. Exocrine Pancreas
  13. Endocrine Pancreas
  14. Small Intestine
  15. Large Intestine
  16. GI Nervous Control
  • Gastrointestinal (Digestive) System
    • Functions:
      • Digestion (breakdown) of food
        • The mechanical and chemical breakdown of macromolecule nutrients into smaller constituent parts 
        • Epithelial cells are specialized for the secretion of enzymes and other chemical substances that aid digestion 
      • Absorption of nutrients
        • Surface area of digestive tract is increased by structural arrangements in different regions 
      • Excretion of waste
        • Excretory system processes toxins and eliminates waste products of metabolism