8. Digestion breakdown of food into molecular components small enough to cross the plasma membrane
9. Mechanical Digestion saliva saliva saliva Same volume of food Small total surface area Larger total surface area A larger surface area speeds up digestion
10. Digestion Definition Digestion is the breaking down of food into smaller and simpler substances Mechanical digestion and Chemicaldigestion do this in different ways ABSORBED ELIMINATED
15. TheDigestiveSystem Mouth / Teeth Esophagus Liver Stomach Small intestine Large intestine Rectum Anus Appendix
16. OBSERVING DIGESTIVE ORGANS External and internal structure of the stomach. a. How would you describe the external appearance of the stomach? b. What is the action (behavior)of the stomach? c. How is the stomach designed to perform its function? External and internal structure of the small and large intestines a. Describe the appearance of the small and large intestines. b. What are the main actions (behavior) of the small and large intestines? c. How is the small intestine designed to perform its function? 3. Determining the pH of gastric juice and bile a. Describe the role of gastric juice and bile in digestion. b. How is the pH of gastric juice and bile related to its role in digestion?
