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LABORATORY EXERCISES. 



which bone is the lower tendon of this 

 muscle (tendon of Achilles) attached? 



2. Determine the position of the flexor muscle 

 of the foot by flexing the ankle as far as 

 possible. Which is the larger, the flexor 

 or the extensor? Why? 

 F. The jaw-muscles. 



Alternately close the jaws tightly together and 

 open them. Find the muscles which 

 cause these movements. Watch in the 

 glass and describe the movements of 

 these muscles. 



Fill out in your note-book a table like the fol- 

 lowing : 



* Before deciding as to position of origin and insertion be sure to 

 put the forefinger on the middle of the belly of each muscle. 



