Presentation on theme: "32.2 Digestive System Sponge Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth Pancreas Salivary Glands Rectum Small Intestines Stomach."— Presentation transcript:
32.2 Digestive System Sponge Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth Pancreas Salivary Glands Rectum Small Intestines Stomach 1 2 3 4 5 6 7 8 9 10 11
32.2 Digestive System mouth Salivary glands esophagus stomach liver gallbladder pancreas Large intestines Small intestines anus rectum
29.4 Central and Peripheral Nervous Systems Set up Cornell Notes on pg. 79 Topic: 32.2 Digestive System Essential Question(s): 1.No EQ 2.1 Atoms, Ions, and Molecules 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
mouth esophagus liver gallbladder large intestine small intestine rectum/anus After digestion is complete, nutrients are absorbed and transported to all cells. Undigested materials are eliminated as liquid and solid wastes (urine/feces)
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 Mouth Teeth: Mechanical digestion, shred and grind food Saliva: chemical digestion Enzyme: amylase (Am-uh-Lays) Breaks down starch into sugars Tongue: Keeps food positioned between teeth Digestion starts in the mouth!!!! stomach
32.2 Digestive System Esophagus Tube that connects mouth to the stomach Peristalsis (pear-ih-stawl-sis) moves food through the organs esophagus muscles contract muscles relax food stomach
32.2 Digestive System Stomach Muscular sac Holds up to 2 quarts of food Continues digestion –Proteins are digested in the stomach Chyme: semi-liquid mixture of food 2-6 hours to digest food
32.2 Digestive System Aid in digestion –Pancreas: helps digest fat, protein, and starches –Liver: Produces bile which helps digest fats –Gallbladder: stores bile liver bile gallbladder duodenum pancreas enzymes chyme stomach Pancreas, Liver, and Gall bladder
32.2 Digestive System Small Intestines Most digestion takes place in the small intestines Digests: –Proteins –Fats –Sugars
32.3 Absorption of Nutrients Large Intestine, Rectum, Anus Large Intestine: helps to maintain the bodys fluid balance Absorbs water and salt Undigested material forms the solid feces. –stored in rectum –eliminated through anus
32.2 Digestive System Sponge 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