DIGESTION OF NUTRIENTS. 



49 



D. Summary. 



1. From the above experiments give a con- 



cise definition of osmosis. 



2. State a law of osmosis that will hold good 



for all the experiments. 



3. Classify all the substances you have tested 



in a table like the following: 



CRYSTALLOIDS. 



(Substances which will readily 

 pass through an animal mem- 

 brane.) 



COLLOIDS. 



(Substances which will not readi- 

 ly pass through an animal 

 membrane.) 



24. DIGESTION OF NUTRIENTS. 



