Digestive System 1) Learn about the major organs in the digestive system 2) Learn the locations of the major organs in the digestive system Teachers' notes Subject Topic Title Grade(s) Cross curricular link(s) Prior knowledge Intended learning outcome(s) Science Digestive System Digestive System 8 Human Body System Some/ Follow up to gallery walk Learn about the major organs of the digestive system and their location. 1
Lesson notes Click on the question mark on the title bar to receive further instruction for that page. If information on organs are already known, skip to activities. Teaching Point: SW differentiate the functions of the digestive system through analyzing notes Do Now: Following the food pathway, list the organs of the digestive system. mouth teeth toungue Homework: Test Thursday 3/6 Body Systems Frog Money $3 2
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Two Types of Digestion: Mechanical Digestion food is physically broken down into smaller pieces Mouth Click on the circle to reveal an example of a body part that performs this type of digestion. Chemical Digestion chemicals produced by the body that breaks food into smaller chemical building blocks Stomach Liver Major Organs: Mouth Epiglottis Esophagus Liver Stomach Pancreas Large Intestine Small Intestine 4
Digestive System.notebook Mouth Place where digestion begins Teeth break off, chew, and grind food Mixes food with saliva to begin dissolving food and make it easier for food to move Epiglottis Flap of cartilage located behind the tongue Closes off the trachea so food does not enter the lungs 5
Digestive System.notebook Esophagus Connects the throat to the stomach Peristalsis the unvoluntary muscle contractions that push the food through the esophagus towards the stomach Stomach Made of ridges, folds, and muscles that keep food moving. Blood vessels and glands line the stomach wall. Produces gastric juices which changes proteins, enzymes, hydrochloric acid and mucas. Partially digested food moves to small intestine 6
Digestive System.notebook Small Intestine Receives substances from the liver and pancreas Contains pancreatic juice which digests fat Mixes with bile from the gall bladder and juice from the pancreas Inner Wall covered with millions of villi Villa Covers the inner wall of the small intestine. Microscopic finger like projections Method by which nutrients can be absorbed into the body Capillaries of villa absorb glucose, amino acids, fats and minerals Liver Located in the upper portion of the abdomen Heaviest organ in the body Produces and secretes bile, which breaks down fat particles. Breaks down medicine, other substances, and eliminates nitrogen Glucose and amino acids are stored in the liver before being carried to all parts of the body Removes harmful substances from the blood 7
Digestive System.notebook Large Intestine Receives undigested food from the stomach Main function: Remove water from undigested matter Form solid waste that can be excreted Pancreas Located beneath the stomach Produces enzymes that help digest proteins, fats and carbohydrates 8
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? Quiz Digestive System Organs Digestive System Organ Quiz Grade: «grade» Subject: Date:«date» 10
1 The digestive system begins in the? A B C D stomach esophagus mouth small intestine 2 What does the digestive system do? A B C D Helps move body parts Sends electronic messages to the body breaks down food pumps blood through the body 11
3 Food is moved from the back of the throat to the stomach by the? A B C D epiglottis esophagus tongue salivary glands 4 What is made of cartilage and prevents food from flowing down the windpipe? A B C D esophagus epiglottis liver saliva 12
5 Peristalsis is the voluntary muscle contractions that pushes food through the esophagus. True False 13