62 



ANATOMY FOR NURSES 



[Chap. V 



Maxillae, or upper jaw-bones, also known as superior maxillary. 

 — The maxilhv are two in number (right and left) and are the prin- 



gXTAL PRoc, 



PTERYGOID FOSSA 



Fig. 37. 



The Two Pal.\te Bones in their N.\tuu.\l Position. Dorsal view. 

 (Gcrrish.) 



cipal bones of the face. Each bone assists in forming (1) part 

 of the floor of the orbit, (2) the floor and outer wall of the nasal 

 fossa?, (3) the greater })art of the roof of the mouth. These 

 bones usually unite before birth to form one bone. When they 

 fail to do so we have the condition known as cleft palate. From 



NA3AL 

 ROCCSS 



POSTERIOR OEN- '. 

 T«L CANALS i 



FRAORBITAL 

 FO R A M E N 

 ASAL NOTCH 



TERIOR NASAL 

 SPINE 



Fig. 38. — The Right Ma.xilla. Outer surface. (Gerrish.) 



a surgical point of view, it is the most important bone of the face, 

 on account of the number of diseases to which it is liable. 



That part of the bone which contains the teeth is called the al- 



