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The Digestive System Page 1 Digestive System Challenge • • • • • Take in complex foods. Mechanically break food down. Chemically break food down. Absorb food to power our bodies. Materials that cannot be absorbed are eliminated through the excretory system. Page 2 Anatomy of Digestion Page 3 Let’s start the journey! In the mouth! Page 4 Salivary Glands: Page 5 Swallowing Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 The Stomach • • • • • • • warm. muscular. very acidic. lined with thousands of gastric glands. gastric juices contain HCL and pepsin. initial chemical breakdown of proteins. more mechanical breakdown. Page 13 The Stomach Page 14 Page 15 The intestinal tract Page 16 Hernia Page 17 Esphagial Junction Page 18 Diverticulosis Page 19 Questions 1. What are two methods we break down food? 2. What happens to materials our bodies cannot break down? 3. What role does saliva play in digestion? 4. What is a sphincter? 5. What does the epiglotis do? 6. Why doesn't the stomach get disgested itself with all the acid in it? 7. What is one cause of a Peptic ulcer? 8. How is the surface area of the intestine increased ? Page 20