PART V. 



OF THE NOSE, THE MOUTH, AND THE THROAT. 

 CHAPTER XII. 



OF THE NOSE. 



THE prominent part of the face, to which the word nose is 

 exclusively applied in ordinary language, is the anterior covering 

 of two cavities which contain the organ of smelling. 



These cavities are formed principally by the upper maxillary 

 and palate bones ; and, therefore, to acquire a complete idea of 

 them, it is necessary to study these bones, as well as the os 

 ethmoides, the vomer, and the ossa spongiosa inferiora, which 

 are likewise concerned in their formation. 



In addition to the description of these bones, in the account 

 of the bones of the head, it will be useful to study the descrip- 

 tion of the cavities of the nose which follows it, (see page 122.) 



After thus acquiring a knowledge of the bony structure, the 

 student will be prepared for a description of the softer parts. 



Of the External Nose. 



The superior part of the nose is formed by the ossa nasi, and 

 the nasal processes of the upper maxillary bones, which have 

 been already described, (see pages 86-89) ; but the inferior 

 part, which is composed principally of cartilages, is much more 

 complex in its structure. 



The orifice, formed by the upper maxillary and nasal bones, 

 is divided by a cartilaginous plate, which is the anterior and 

 inferior part of the septum, or partition between the two cavi- 

 ties of the nose. The anterior edge of this plate projects beyond 

 the orifice in the bones, and continues in the direction of the 



