NUTRITION. 303 



Questions. What is nutrition ? What is sought for in constructing 

 a machine ? Why the necessity for this ? How is it in the animal 

 machine ? Is the system constantly undergoing changes t^ How is 

 this shown ? What vessels repair the losses of the system ? What ani- 

 mals are subject to the most rapid changes of matter ? What contains 

 the materials of nutrition ? When is nutrition most active ? when 

 least so ? What is the consequence ? What does the degree of nutri- 

 tion depend on ? Does fatness indicate strength f f Why not ? What 

 use does the hump of the camel serve ? What are tumours and wens 

 owing to ? What causes muscular nutrition ? 



