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Living Environment Digestive System Aim What is the function of the digestive system? What are the structures of the digestive system? How does the digestive system work to maintain homeostasis? Major Structures of the Digestive System 1. Mouth 2. Pharynx 3. Esophagus 4. Stomach 5. Small Intestine 6. Large Intestine Accessory Structures of the Digestive System 1. Salivary glands 2. Pancreas 3. Liver What is the function of the digestive system structures? To convert foods into simpler molecules that can be used by the cells of the body Chemical vs Mechanical Digestion Chemical Digestion: The breakdown of food by chemicals in the mouth(digestive enzymes) and stomach(Acids/Enzymes) Mechanical Digestion: Physical breakdown of food in the mouth(chewing) and stomach(muscular contractions) Describe how each of the following aids in digestion use text pgs 978-984 1. Mouth/teeth Mechanical and chemical digestion 2. Saliva Chemical digestion 3. Esophagus Peristalsis, pushing food to the stomach 4. Stomach Mechanical & Chemical digestion 5. Pancreas/liver Secrete digestive enzymes 6. Small Intestine Chemical digestion/nutrient absorption 7. Large Intestine Remove water from undigested material Living Environment Digestive System Aim What is the function of the digestive system? What are the structures of the digestive system? How does the digestive system work to maintain homeostasis? Major Structures of the Digestive System 1. 2. 3. 4. 5. 6. Accessory Structures of the Digestive System 1. 2. 3. What is the function of the digestive system structures? Chemical vs Mechanical Digestion Chemical Digestion: Mechanical Digestion: Describe how each of the following aids in digestion. Use text pgs 978-984 1. Mouth/teeth 2. Saliva 3. Esophagus 4. Stomach 5. Pancreas/liver 6. Small Intestine 7. Large Intestine