LABORATORY EXERCISES. 



outer and inner coverings of the cheek? 

 What are the characteristics of mucous 

 membrane (inner covering) ? 



3. Pull aside with the forefinger one corner of 



the mouth. Notice the small elevation 

 on the inside of the cheek. Opposite 

 what tooth does it lie? (The duct from 

 one of the salivary glands opens on this 

 elevation.) 



4. Press the tongue down with the forefinger. 



Make a drawing of the opening into the 

 throat 



5. If possible, locate and describe the tonsils. 

 B. The teeth. 



1. Close the jaws and open the lips; do the 



front teeth of the upper jaw cover the 

 ends of the lower teeth or vice versa? 



2. Are the front teeth of the upper jaw larger 



or smaller than those of the lower jaw? 



3. Count your teeth and record result in a 



table like the following : 



Place a piece of string between the teeth 

 and describe motion of jaws in biting it 

 off . Describe the movements of the j aws 

 in chewing, 



