STOMACH DIGESTION 73 



40. Illustrate stomach action by placing small slices of hard-boiled 



egg in 



Hydrochloric acid, 40 drops, 



Pepsin, i grain, 



Water, pint. 



Keep the mixture in a warm place, shaking it occasionally. In a few 

 days the egg will completely dissolve. Show some powdered pepsin 

 and some dilute hydrochloric acid. 



41. Boil some potatoes and meat for several hours, to illustrate the 

 appearance of chyme as it leaves the stomach. 



REVIEW TOPICS 



1. Describe the two main cavities of the body. 



2. Describe the lining of the abdomen. 



3. Describe a serous membrane. 



4. Describe the stomach. 



5. Describe the gastric juice and the glands in which it 



is formed. 



6. Tell the name and the action of the acid of the gastric 



juice. 



7. Tell the names and the actions of the two ferments. 



8. Tell how each class of food is affected by the stomach, 



and how much. 



9. Describe the peristaltic movements of the stomach. 



10. Tell how the food passes from the stomach into the 



intestine. 



11. Tell how important the work of the stomach is in 



comparison with the work done in the intestine. 



