400 QUESTIONS ON 



19. How many passages open from this chambo/? What are they I 



20. Where is the mouth of the windpipe? What is the epiglottis? 



21. What are the offices of the epiglottis? 



22. Why can we not breathe when swallowing? 



23. Describe the oesophagus or gullet. 



24. How does the (Esophagus move the food towards the stomach? 



CHAPTER III. 



25. Describe the stomach? Why is it always full ? 



26. On what does the average size of the stomach depend? 



27. What is the texture of the stomach ? Of how many coats is it 

 composed? Describe the outer or peritoneal coat. 



28. Describe the middle or muscular coat. 



29. The inner or mucous coat. 



30. What familiar illustration of these coats? 



31. What office do these coats severally perform in the digestive 

 process? By what is the food dissolved in the stomach ? 



32. 33. "What effect has the gastric juice on all proper kinds of food ? 



34. What opportunity had Dr. Beaumont ? 



35, 36. What observations of Dr. Beaumont and others have made 

 known the steps of the process ? 



CHAPTER IV. 



37. Do Dr. Beaumont's observations explain the process? or only 

 reveal the several stages of digestion ? What advantage results from 

 a complete mastication ? 



38. In what quantity is the gastric juice secreted ? 



39. What is the limit of this secretion ? What is the consequence 

 of this limit? 



40. Have we any measure of the amount of food which we ought 

 to take at a meal ? How can this measure be ascertained ? 



41. What condition is necessary to make this measure a guide ? 



42. What is hunger? When felt? 

 43,44. Give the illustration. 



45. When does the work of digestion begin? How long is the gas- 

 tric juice secreted ? 



CHAPTER V. 



46. What is the relative position of the stomach, lungs, and dia- 

 phragm ? 



47. How does respiration keep the stomach in motion ? What effect 

 has this motion on digestion? 



48. To what substance is all the food reduced in the stomach ! 



49. What temperature does digestion require ? 



50. Relate Dr. Beaumont's experiments. 



