1082 



THE ORGANS OF SPECIAL SEXSE 



of the orifice of the nostril. The portion which forms the inner wall (cms mediale), thicker 

 than the rest, is loosely connected with the corresponding portion of the opposite cartilage to 

 form a small part of the coluinna. Its inferior border, free, rounded, and projecting, forms. 

 with the thickened integument and subjacent tissue and the corresponding parts of the opposite 

 side, the mobile septum. The part of the cartilage which forms the outer wall (cms laterale) is 



Seen from below. 



Kide view. 



Lower lateral cartilage. 



~>Sesamoid cartilages. 



FIGS. 787 and 788. Cartilages of the nose. 



curved to correspond with the ala of the nose; it is oval and flattened, narrow behind, where it 

 is connected with the nasal process of the maxilla by a tough fibrous membrane, in which are 

 found three or four small cartilaginous plates, the sesamoid or lesser alar cartilages (cartilayinm 

 dares minores). Above, it is connected by fibrous tissue to the upper lateral cartilage and front 

 part of the cartilage of the septum; below, it falls short of the margin of the nostril; the ala 

 being completed by dense cellular tissue covered by skin. In front the lower lateral cartilages 

 are separated by a notch which corresponds with the point of the nose. 



The cartilage of the septum (carfilar/ 

 septi nasi) (Figs. 787 and 789) is somewhat 

 quadrilateral in form, thicker at its margins 

 than at its centre, and completes the sepa- 

 ration between the nasal fossae in front. Its 

 anterior margin, thickest above, is connected 

 with the nasal bones, and is continuous with 

 the anterior margins of the two upper lateral 

 cartilages. Below, it is connected to the 

 inner portions of the lower lateral cartilages 

 by fibrous tissue. Its posterior manjin is 

 connected with the perpendicular lamella of 

 the ethmoid; its inferior margin with the 

 vomer and the palate processes of the max- 

 illae (Fig. 789). 



It may be prolonged backward (especially 

 in children) for some distance between the 

 vomer and perpendicular plate of the eth- 

 moid, forming what is termed the sphenoidal 

 process (processes gphenoidalis xcpti cartila- 

 <jii'i}. The septal cartilage does not reach 

 as far as the lower part of the nasal septum. 

 This is formed by the thinnest portions of the 



lower lateral cartilages and by the skin; it is freely movable, and 'hence is termed the mobile 

 septum. 



Along the lower margin of the anterior half of the cartilage of the septum is another cartilage 

 which is attached to the vomer and is known as the vomerine cartilage, or cartilage of Jacobson 

 (cartilago vomeronasalis). 



FIG. 789. Bones and cartilage of septum of the nose. 

 Right side. 



