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The Digestive System

The Digestive System . 6 th Grade . It starts in the MOUTH. Mastication : when your teeth break food into smaller pieces. Mouth : What is the purpose of the tongue? . Moves small pieces of food around so that saliva can be mixed with them Helps push food to the back of the throat

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The Digestive System

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  1. The Digestive System 6th Grade

  2. It starts in the MOUTH • Mastication: when your teeth break food into smaller pieces

  3. Mouth: What is the purpose of the tongue? • Moves small pieces of food around so that saliva can be mixed with them • Helps push food to the back of the throat • Helps us taste our food so that eating food is enjoyable and desirable

  4. Mouth: Why is saliva important? • Helps moisten food so that it is easier to digest and move through the body • Begins digesting carbohydrates

  5. Parts of the Mouth

  6. What is another name for the throat? • Pharynx = throat • 2 functions of the throat: • To pass chewed food from the mouth to the esophagus • To pass air from the nose to the lungs EPIGLOTTIS: a flap of tissue that keeps food from going into your windpipe

  7. Esophagus • Moves food from the throat to the stomach • Peristalsis: the muscle movement • Heartburn is when acid from your stomach gets into your esophagus

  8. Stomach • A storage tank for food • Contains hydrochloric acid that kills bacteria • Contains digestive enzymes to further break down food • Can stretch and shrink

  9. Stomach

  10. Small Intestine • Much longer than the large intestine • 1.5 inches wide • Nutrients from food pass into the bloodstream through the small intestine walls • By the time food leaves the small intestine, 90% of all nutrients have been extracted from the food

  11. Liver • Weighs about 3 pounds • Produces bile which helps digest fat • Processes nutrients in the blood • Filters out harmful toxins

  12. Gall Bladder • Stores and recycles bile from the liver • Fatty diets can cause gallstones

  13. Pancreas • Secretes digestive enzymes into the small intestines to help the chemical digestion of foods • Regulates blood sugar by producing insulin

  14. Large Intestine • Takes the leftover parts of the food that the small intestines does not absorb • Absorbs water and vitamins B & K from the waste matter • Important because it prevents you from getting dehydrated

  15. Rectum & Anus • Rectum: stores feces • Anus: releases feces when rectum is full

  16. On a sheet of paper, write the name of each colored organ: • Green: • Red: • Pink: • Brown: • Purple: • Green: • Yellow:

  17. Answers! • Green: Esophagus • Red: Stomach • Pink: Small Intestine • Brown: Large Intestine • Purple: Liver • Green: Gall Bladder • Yellow: Pancreas

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