USMLE

Ingestion

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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
  • Ingestion (Mouth and Esophagus)
    • Taking in food by the mouth (also known as the oral/buccal cavity)
      • First step of digestion
    • Breakdown of food
      • Chewing (mechanical breakdown)
      • Salivary Amylase and Lipase (chemical breakdown)
      • Lubrication (saliva)
    • Broken down food (called a bolus) moved into esophagus by swallowing
      • Food moved along by smooth muscle contractions (peristalsis)
        • The wave-like propulsion of food through contractions in GI tract
      • Sphincter muscles at top and bottom of esophagus control movement of food