1198 



A MANUAL OF ANATOMY 



border of the superior maxilla. The lower border is connected by 

 fibrous tissue to the upper margin of the lower lateral cartilage. 



The lower lateral cartilages are also known as the cartilages of the 

 apertures. They are situated below the upper pair, and each is 

 bent so as to lie in front, and on each side, of the nostril, which it 

 keeps open. Its outer portion is called the crus laterale, and its 

 inner portion the crus mediale. 



Frontal Air-Sinus 



Nasal Bone 



Perpendicular^'' 

 Plate of 

 Ethmoid 



Palatal Process of Palate ' 

 Bone (in section) 



Cartilage of 

 Aperture 

 Septal Cartilage 



Cartilage of Jacobson 



Palata Process of Superior Maxilla 

 (in section) 



Fig. 490. — The Osseous and Cartilaginous Nasal Septum (Right 

 Lateral View). 



The crus laterale is attached by fibrous tissue to the upper lateral j 

 cartilage, and to the lower part of the nasal notch on the mesial; 

 border of the superior maxilla. The crus mediale is folded back-, 

 wards, and is contiguous to its fellow of the opposite side. It lies] 

 along the upper part of the columella nasi, and along the antero- 

 inferior border of the cartilage of the septum. Anteriorly it is^ 

 separated from its fellow by a notch. 



In the fibrous tissue which connects the crus laterale to thej 

 superior maxilla two or more isolated portions of cartilage are met] 

 with, called the sesamoid or minor cartilages. 



