132 OUR BODIES AND HOW WE LIVE 



QUESTIONS ON THE TEXT 



I. What, in a general way, is the object of digestion? 2. What 

 is the alimentary canal ? 3. Mention the various parts of the alimen- 

 tary canal. 4. What takes place in the mouth? 5. Describe the 

 process of chewing, or mastication. 6. Describe the structure of 

 the teeth. 7. Mention the number and situation of the teeth, giving 

 the name of each. 8. What are the salivary glands? 9. What is 

 saliva, and what is its action ? 10. What is meant by secretion and 

 excretion ? 



II. Describe the process of swallowing food. 12. What is the 

 epiglottis, and what useful purpose does it serve? 13. Explain 

 the action of the gullet, or food pipe. 14. Describe the stomach. 

 15. What happens when the food reaches the stomach ? 16. What 

 is gastric juice, and how is it secreted ? 17. Describe the action of 

 the gastric juice. 18. Describe the small intestine. 19. What is the 

 liver? 20. How does bile help in digestion ? 



21. What is pancreatic juice, and what is its action ? 22. Describe, 

 in a general way, the process of absorption. 23. What part do the 

 lacteals play in the process of absorption ? 24. What is the thoracic 

 duct, and what is its use ? 25. What are the lymphatics, and what 

 work do they do ? 26. Describe the spleen and other ductless glands. 

 27. Describe absorption by the blood vessels. 28. What is the large 

 intestine and what purpose does it serve ? 29. Upon what does the 

 required quantity of food depend? 30. What are some of the ill 

 effects of eating too much ? 



31. What should guide us as to what we should eat ? 32. Describe 

 in full when we should eat. 33. What can you say about the time 

 to eat ? 34. Mention other hints about eating. 35. Give some hints 

 about the care of the teeth. 36. What are some of the effects of 

 alcoholic liquors upon the stomach ? 37. What are some of the effects 

 of the long-continued use of alcohol upon the structure of the stomach? 

 38. What is the effect of alcohol on the liver? 39. Describe the 

 effect of tobacco on digestion. 40. What is the effect of smoking 

 cigarettes on digestion? 



