The Digestive System: Duodenum

The Digestive System: Duodenum

1. Anatomy

   • Alimentary Canal
     • Mouth
       • Pharynx
         • Esophagus
           • Stomach
             • Small Intestine
               • Large Intestine
               • Part 1: Duodenum
               • Part 2: Jejunum
               • Part 3: Ileum
   • Accessory Organs
     • Teeth
       • Tongue
         • Gallbladder
           • Salivary glands
             • Liver
               • Pancreas
   • Histology
     • Layer 1: Mucosa
       • Layer 2: Submucosa
         • Layer 3: Muscularis Exterana
           • Layer 4: Serosa
       • Circular Folds - Deep folds of the mucosa
       • Villi - Fingerlike projections of the mucosa
         • Crypts - Indentations between the villi containing tubular glands
           • Types of Cells:
             • Enterocytes
               • Goblet Cells
                 • Enteroendocrine Cells
                   • Stem Cells
       • Microvilli - Long, densely packed extensions of individual absorptive cells

2. Physiology

   • Breakdown Food
     • Carbohydrate Digestion
       • Protein Digestion
         • Fat Digestion
           • Nucleic Acid Digestion
   • Absorb Nutrients
   • Transport food throughout system
   • Absorbs Water