1. Overview of Animal Nutrition
   1. Animal diets
      1. Herbivores
      2. Carnivores
      3. Omnivores
   2. The four stages of food processing
      1. Ingestion
      2. Digestion
         1. Mechanical digestion
         2. Chemical digestion
            1. Hydrolysis
            2. Enzymes
      3. Absorption
      4. Elimination
2. A Tour of the Human Digestive System
   1. Digestive tube
      1. Mouth
      2. Pharynx
      3. Esophagus
      4. Stomach
      5. Small intestine
      6. Colon of large intestine
      7. Appendix
      8. Rectum
      9. Anus
   2. Accessory organs
      1. Salivary glands
      2. Liver
      3. Gallbladder
      4. Pancreas
   3. Absorption of nutrients
      1. Large intestine
      2. Duodenum
3. Human Nutritional Requirements
   1. Food as fuel
      1. Calories
      2. Cellular respiration
   2. Food as building material
      1. Metabolism
      2. Essential nutrients
         1. Essential amino acids
         2. Vitamins
         3. Minerals
         4. Essential fatty acids
4. Nutritional Disorders
   1. Malnutrition
   2. Eating disorders
   3. Obesity