32 2 Digestive System Word Bank Anus Esophagus

32. 2 Digestive System Word Bank Anus Esophagus Gallbladder Large Intestine Liver Mouth Pancreas Salivary Glands Rectum Small Intestines Stomach Sponge 11 1 2 10 3 9 4 8 7 5 6

32. 2 Digestive System mouth Salivary glands esophagus liver gallbladder Large intestines anus stomach pancreas Small intestines rectum

Set Cornell Notes on pg. 29. 4 up. Central and Peripheral Nervous Systems 79 32. 2 Digestive System 2. 1 Atoms, Ions, and Molecules • Topic: 32. 2 Digestive System • Essential Question(s): 1. No EQ

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 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 stomach food

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 Pancreas, Liver, and Gall bladder • Aid in digestion – Pancreas: helps digest fat, protein, and starches – Liver: Produces bile which helps digest fats – Gallbladder: stores bile liver bile stomach chyme enzymes gallbladder pancreas duodenum

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 body’s 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