THE HEAD AND NECK. 



107 



lage and lubricated with, synovial fluid, allow the 

 head to move freely up and down, or sideways, even 



t 



oc 



FIG. 15. Side view of the skull of man, with the 

 bone removed so as to show the whole of the teeth. 

 g, zygomatic arch ; n, nasal bone ; o, or it ; t, tem- 

 poral fossa ; oc, occipital condyle ; e, external audi- 

 tory opening; g, glenoid fossa for articulation of 

 the lower jaw ; c, coronoid process of lower jaw ; 

 i l and * 2 , incisor teeth ; ceo, canine ; pm l and pw 2 , 

 premolar teeth; w 1 , w 2 , and m 3 , the three molar 

 teeth. . 



when the neck is fixed. The same region also shows 

 various roughened, projecting ridges or promontories 

 for the attachment of the powerful ligaments and 



