Outline for Digestion

1. Types of Food
   1. Small particles: filter feeders
   2. Large particles: scraping, chewing, external liquifaction, biting
   3. Symbiotic supply
2. Digestive systems in vertebrates
   1. Mouth and jaws: some specializations
   2. Teeth: undifferentiated and differentiated
   3. Gastrointestinal tract: general organization
      1. Mucosa, plexuses, muscles: regional specialization
      2. Control and local reflexes: plexuses, enterogastrones, autonomic nervous system
   4. Stomach
      1. Function and anatomy
      2. Secretions: pepsin(ogen) and HCl. Mechanisms of HCl secretion
      3. Control: autonomic, plexuses, enterogastrones (gastrin, CCK, GIP)
         • Reflexes and feedback control
   5. Duodenum
      1. Function and anatomy
      2. Control of stomach, pancreas, gall bladder by duodenum
   6. Liver
      • Bile and gall bladder
3. Intestine
   1. Enzymes
   2. Mechanisms of absorption