THE DIGESTIVE SYSTEM

1. THE DIGESTIVE SYSTEM

2. Q #1 • Digestion begins in the oral cavity. • Process called digestion occurs as food is broken down both chemically and mechanically. • Broken down foods must be absorbed into the blood stream. • Undigested food remains are removed, or excreted, from the body in feces.

3. Organs forming the continuous tube from the mouth to the anus are collectively called the gastrointestinal tract. • Organs outside of the digestive tract proper (food does not travel through) and secrete their products into the digestive tract are called accessory digestive system organs.

4. Q #2

6. Q #3

7. Q #4 1. Intestinal glands 2. Salivary glands 3. Pancreas 4. Liver 5. Gastric glands

8. Q #5 • 1. mesentery • 2. villi • 3. Peyer’s patches • 4. plicaecirculares • 5. oral cavity, stomach • 6. tongue • 7. pharynx • 8. greater omentum, lesser omentum, mesentery • 9. esophagus • 10. rugae • 11. haustra • 12. microvilli • 13. ileocecal valve • 14. small intestine • 15. colon • 16. vestibule • 17. appendix

9. 18. stomach • 19. lesser omentum • 20. small intestine • 21. pyloric sphincter • 22. soft palate • 23. small intestine • 24. parietal peritoneum • 25. anal canal • 26. hard palate

10. Q #6

12. Q #7 • 1. esophagus • 2. rugae • 3. gallbladder • 4. cecum • 5. circular folds • 6. frenum • 7. palatine • 8. saliva • 9. protein absorption

13. Q #9

15. Q #10

16. Q #11 • 1. deciduous • 2. 6 months • 3. 6 years • 4. permanent • 5. 32 • 6. 20 • 7. incisors • 8. canine • 9. premolars • 10. molars • 11. wisdom

17. #12

18. Q #13 • Functions of Digestive System • 1. eating • 2. swallowing, segmentation and propulsion • 3. chewing, churning • 4. enzymatic breakdown • 5. transport of nutrients from lumen to blood • 6.elimination of feces

19. Diseases and Disorders – Q #15 • Appendicitis – inflammation and infection of the appendix • Constipation – inability to pass feces • Diarrhea – passage of watery stools • Gallstones – associated with prolonged storage of bile in the gallbladder; causes severe epigastric/abdominal pain

20. Heartburn – GERD (gastroesophageal reflux disorder); results from reflux of acidic gastric liquids into the esophagus • Jaundice – yellowing of eyes and skin; indicates liver problems or blockage of the biliary ducts • Peritonitis – inflammation of the abdominal membrane • Ulcer – erosion of the stomach or duodenal mucosa

21. Monosaccharides Fructose Galactose Glucose Disaccharides Sucrose Lactose Maltose Q #17 Carbohydrates

22. Proteins • Amino acids

23. Lipids/Fats • Fatty acids and Glycerol

24. Most important for energy? • GLUCOSE

25. Nutrition and Metabolism – Q #20 • Amino acids • Tend to be conserved by cells • Used to make the bulk of cell structure and enzymes • Carbohydrates • Most used substance for producing ATP • Fats • In myelin sheaths and cell membranes • Second most important energy source • Insulates organs

26. Q #21 • Carb-rich foods

27. Fatty foods in normal diets

28. Protein rich foods

29. Only important digestible polysaccharide STARCH An indigestible polysaccharide that aids in elimination CELLULOSE

30. Found in vegetables and fruits and used as co-enzymes VITAMINS Include copper, iron, and sodium MINERALS