74 



PRACTICAL ANATOMY. 



ings of the nose and assists in supporting the soft 

 structures. The entire partition is called the septum 

 nasi. It is smooth, covered with periosteum and mucous 

 membrane. The outer wall is exceedingly irregular, 

 and is formed by the superior maxillary, lachrymal, 

 palate, inferior turbinated, and internal plate of the 

 pterygoid process. Traversing the outer wall from front 

 to back are the superior and middle turbinated processes 

 of the ethmoid and the inferior turbinated bone. These 



floor 



Ant.Na.ial Sfint 



PdUOt tree. ofSuf-Max. 



Kioto free. cfTatatt. 



flat. Natal tynnt 



4nt. Fu.laM.tu Canal 





FIG. 32. NASAL MEATUSKS. 



divide each nasal cavity into three horizontal passages, 

 the superior, middle, and inferior meatuses. The infe- 

 rior is situated below the inferior turbinated bone, the 

 middle between the middle turbinated process of the 

 ethmoid and the inferior turbinated bone, the superior 

 above the middle turbinated process. Of these, the 

 largest is the inferior meatus. It is bounded below 

 by the floor of the nose; at its anterior part is the 

 opening of the lachrymal canal. The middle meatus 

 occupies the posterior two-thirds of the nasal cavity. 





