ABSORPTION AND ASSIMILATION 97 



are carrying the emulsified fat from the intestine. The fluid looks 

 like milk, and so the name lacteals, or milk tubes, was given to the 

 tubes. (See demonstration 35.) 



49. Probably some boy in the schoolroom who is suffering with a 

 bilious attack will be willing to show his tongue to the class. Notice 

 that it is covered with a thick white or yellow fur. Explain that the 

 tongue is a part of the alimentary canal, and that the stomach and 

 intestine are in a like condition. Explain that, when the rest of the 

 alimentary canal is acting well, the tongue is clean and the breath 

 sweet. 



REVIEW TOPICS 



1. Describe the diffusion of digested food into the blood. 



2. Trace a particle of digested fat from the intestine to 



the blood, and tell what finally becomes of it. 



3. Describe how the liver uses digested sugar. 



4. Describe how digested albumin becomes a part of the 



blood, and tell of what use it is to the body. 



5. Tell how the liver removes poisons from the absorbed 



food. 



6. Tell how a disturbance of digestion, in either the stom- 



ach, intestine, or liver, disturbs each of the other 

 organs. 



7. Show that each organ of digestion is perfectly adapted 



to its own work. 



OV. PHYSIOL. 7 



