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Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
Digestive system
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Digestive system

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  • 1. Digestive System<br />6th Grade Science<br />
  • 2.
  • 3. I. Function<br />A. Breaks down food<br />1. Mechanical – Physical<br />2. Chemical - Enzymes<br />B. Absorb nutrients into body<br />C. Eliminate waste<br />60<br />
  • 4. II. Parts<br />A. Length<br /> 9 meters long<br />*Why so long?*<br />B. Alimentary Canal “Tube”<br />Mouth<br />Esophagus<br />Stomach<br />Small Intestine<br />Large Intestine<br />
  • 5. C. Accessory Organs<br />Teeth<br />Tongue<br />Salivary Glands<br />Pancreas<br />Liver<br />Gallbladder<br />
  • 6. III. Pathway<br />Mouth<br />1. Mechanical<br />i. Teeth<br /> a. Regions<br /> 1. Crown<br /> 2. Neck<br /> 3. Root<br /> b. Parts<br /> 1. Enamel<br /> 2. Dentin<br /> 3. Pulp<br />62<br />
  • 7. i. Teeth<br />c. Types<br /> 1. Incisors “Cut”<br /> 2. Canine “Tear”<br /> 3. Molar “Grind”<br />*What can we learn about teeth types?*<br />62<br />
  • 8. ii. Tongue<br />Thick muscle<br />Taste buds<br />Sour<br />Bitter<br />Sweet<br />Salt<br />Umami<br />62<br />
  • 9. 2. Chemical<br />i. Salivary Glands<br /> a. Enzyme Amylase<br /> 1. Carbohydrates<br />*Why sugars?*<br />63<br />
  • 10. B. Throat<br />1. Trachea for air to lungs<br />2. Esophagus for food to stomach<br />i. Pushed down by muscle contractions<br /> (Peristalsis)<br />3. Separated by epiglottis<br />*What problems does this create?*<br />63<br />
  • 11. C. Stomach<br />1. Mechanical<br />i. Three layers of muscle<br />2. Chemical<br />i. Enzyme Pepsin<br /> a. Protein<br /> ii. High Acid<br /> a. Unfold protein<br /> b. Kill germs<br /> c. Covered in mucus<br />*Antacids?*<br />64<br />
  • 12. D. Pancreas<br />1. Produces enzymes<br /> a. Protein, Fat, Carbs<br />2. Produces Hormones<br /> a. Insulin – Controls blood sugar levels<br />70<br />
  • 13. E. Liver/Gallbladder<br />1.Largest internal organ<br />2. Maintain blood<br />3. Produces bile<br />i. Store in gall bladder<br /> ii. Aid in fat digestion<br />4. Removes poisons from food/drink?<br />*Alcohol destroys liver, Why?*<br />69<br />
  • 14. F. Small Intestine<br /> 1. Mechanical <br /> 2. Chemical<br /> - Many enzymes<br /> *3. Absorption*<br /> - Tiny Villi<br /> 4. Size<br />i. Length 5 meters<br /> ii. Width 3-4 cm<br />70<br />
  • 15. G. Large Intestine<br />Mechanical<br />Chemical<br />i. Lots of bacteria<br /> ii. Produce key vitamins<br />3. Absorption of water<br />4. Removal of waste<br />5. Size<br />i. Length 1.5 meters<br /> ii. Width 4 - 6 cm<br />APPENDIX?<br />71<br />
  • 16. H. Anus<br />
  • 17. IV. Diseases<br />Heart Burn<br />B. Ulcers<br />C. Diabetes<br />D. Gallstones<br />E. Appendicitis<br />F. Cancer<br />G. Irritable bowel syndrome<br />1. Crohn’s disease<br />2. Ulcerative colitis<br />

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