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Lesson 2 The Digestive System Predict three facts that will be discussed in Lesson 2 after reading the headings. Record your predictions in your Science Journal. Sequence the 4 steps that food follows in the digestive Functions of the Digestive System I found this on page system. . 1 Ingestion: 2 Digestion: 3 Absorption: 4 Elimination: Types of Digestion I found this on page Identify the 2 types of digestion. . Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Types of Digestion Mechanical I found this on page . Record two functions of enzymes during digestion. Enzymes I found this on page . Explain the role of some enzymes in chemical digestion. Enzyme Role and papain break down proteins Amylase Lipase Digestion and Excretion 149 Lesson 2 | The Digestive System (continued) I found this on page . Sequence how an enzyme breaks down food molecules into smaller pieces. 1 An attaches to a I found this on page . . 2 The speeds up a that breaks down the . 3 The releases the . Describe the role of each organ in the digestive system. Organs of the Digestive System Organ Description Tongue and teeth: . Mouth Salivary glands: I found this on page . Esophagus Peristalsis: I found this on page . Stomach Chyme: I found this on page . Small intestine Villi: I found this on page 150 Digestion and Excretion . Large intestine Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. I found this on page Lesson 2 | The Digestive System (continued) I found this on page . Identify two roles of helpful bacteria in the digestive system. Bacteria Summarize how the digestive system interacts with other The Digestive System and Homeostasis I found this on page systems to keep the body healthy. . Nutrients from are absorbed by the . Nutrients are necessary to all . carries the nutrients to all other Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. . providing materials and energy. Apply It Color and label the parts of the human digestive system. • Color the organs through which food passes blue. • Color the accessory organs red. • Label the mouth, small intestine, pancreas, stomach, gallbladder, liver, tongue, large intestine, teeth, esophagus, and salivary glands. Tongue Salivary glands Esophagus Liver Stomach Gallbladder Pancreas Large intestine Small intestine Rectum Digestion and Excretion 151
