138 



A MANUAL OF ANATOMY 



the incisor crest of the superior maxilla, is the upper opening of 

 Stensen's canal. 



The inner wall is known as the septum nasi. The osseous 

 septum is formed by ten bones, in the following order, as nearly as 

 possible, from below upwards : the nasal crests of the palatal 

 processes of the superior maxillae and palate bones ; the vomer ; 

 the perpendicular plate of the ethmoid ; the rostrum of the 



Frontal Sinus 

 Crista Galli 

 Half of Cribriform Plate. 



Perpend Plate of Ethmoid 

 (showing Olfact. Grooves) \ 



Sphenoidal Sinus 

 Sella Turcica 



Dorsum Sellse i 



Clivus 



Atrium of 

 Middle Meatus 



Ant. Nasal 

 / Spine 



Ext. Pteryg. Platen 



Hamular Process of ^ 

 Int. Pterygoid Plate 



Vomer 



Upper Opening of 

 Stensen s Canal 



Foramen of Stensen 



Fig. Si. —Sagittal Section of the Anterior Part of the Skull 

 TO THE Right of the Nasal Septum. 



sphenoid ; the nasal crest of the nasal bones ; and the nasal 

 spine of the frontal. The anterior border of the osseous septum 

 presents a triangular deficiency, which is occupied in the recent 

 state by the septal cartilage. The posterior border is formed by 

 the posterior border of the vomer, which lies between the posterior 

 nares. As previously stated, the septum is usually deflected to one 

 side, most commonly the left. 



