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32.2 Digestive System Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth Pancreas Salivary Glands Rectum Small Intestines Stomach Sponge #8 1 11 2 10 3 9 4 8 7 5 6 32.2 Digestive System mouth Salivary glands esophagus liver stomach gallbladder pancreas Large intestines anus Small intestines rectum 32.2 Digestive System KEY CONCEPT The digestive system breaks down food into simpler molecules. 32.2 Digestive System •In 1822, Alexis St. Martin was shot in the stomach and treated by William Beaumont, an army surgeon •The bullet had left a small hole in his stomach •Beaumont persuaded St. Martin to let him observe the digestive process by tying foods to string, putting them into the stomach, and observing how the food was digested 32.2 Digestive System The digestive system is a collection of organs that breaks down food into energy that can be used in cells mouth esophagus liver gallbladder large intestine small intestine rectum/anus 32.2 Digestive System 32.2 Digestive System • After digestion is complete, nutrients are absorbed and transported to all cells. mouth esophagus liver • Undigested materials are eliminated as liquid and solid wastes (urine/feces) gallbladder large intestine small intestine rectum/anus 32.2 Digestive System Digestion begins in the mouth and continues in the stomach. • Mechanical (teeth) and chemical (saliva) digestion break down food. • Peristalsis moves food through the organs. esophagus muscles contract muscles relax food stomach 32.2 Digestive System • Digestion of carbohydrates begins in the mouth. • Digestion of proteins occurs in the stomach. • Digestion of fats and sugars occur in the small intestine. 32.2 Digestive System • Most digestion takes place in the small intestines. • The pancreas, liver, and gallbladder aid in digestion. – pancreas helps digest fat and protein – bile from the liver/gallbladder helps digest fats liver bile stomach chyme bile enzymes gallbladder pancreas duodenum 32.2 Digestive System Sponge # 9 1. What is the main function of the digestive system? 2. Describe how the mouth uses both mechanical and chemical digestion. 3. What three organs aide the small intestine with digestion? 4. If you ate a meal of spaghetti and meatballs, where would digestion of the pasta begin? The meat? 32.2 Digestive System • What is the main function of the digestive system? • To break down food into smaller molecules for the body to absorb and use for energy. • Describe how the mouth uses both mechanical and chemical digestion. • Mechanical: teeth chew food • Chemical: enzymes in saliva break down starches • What three organs aide the small intestine with digestion? • Gallbladder, liver, and pancreas • If you ate a meal of spaghetti and meatballs, where would digestion of the pasta begin? The meat? • Spaghetti: in mouth- starches • Meatballs: in stomach- proteins 32.2 Digestive System Circulatory and Digestive System Posters • Title on top • Describe the FUNCTION (job) of your organ • Draw a picture • Answer all questions on prompt • Color • Use Big font