THE ORGANS OF SPECIAL SENSE 



267 



The nasal fossae are two irregular cavities extending 

 upward and backward from the nostrils or anterior nares, 



Upper lateral 

 cartilage. 



Lower lateral 

 cartilage. 



Sesamoid bones. 

 Cell-tissue. 



FIG. 141. Lateral cartilages of the nose (Ingals). 



terminating in the pharynx as the posterior nares. They 

 are bounded superiorly 'by the sphenoid and ethmoid 



FIG. 142. Nerves of nose and sphenopalatine ganglion, from inner side: 

 i, Network, of external branches of olfactory nerve; 2, nasal nerve, giving 

 its external branch to outer wall of nose ; the septal branch is cut short; 3, 

 sphenopalatine ganglion; 4, ramification of large palatine nerve ; 5, small, 

 and 6, external palatine nerve; 7, inferior nasal branch; 8, superior nasal 

 branch ; 9, nasopalatine nerve cut short; 10, Vidian nerve ; n, great super- 

 ficial petrosal nerve; 12, great deep petrosal nerve; 13, the sympathetic 

 nerves ascending on internal carotid artery. 



bones; inferiorly, by the hard palate. In the middle line 

 they are separated from each other by a bony and fibro- 



