TIIK NOSE 



1069 



situated inferior to the septal curt i la ire :in<l forming the tip of the nose and the ventral 

 part of the mobile septum. The /til/ nil ri us joins the medial crus at the apex of 

 the nose; it is somewhat oval in shape, and curves dorsally in the superior and ventral 

 portion of the ala. It is connected posteriorly to the nasal margin of the maxilla 

 by a dense mass of lihrous and fatty tk-ue, and helps to maintain the contour of 

 this part of the nose. A variable numb 11 cart ilages, lesser alar (sesamoid) 



cartilages, are found in this fibrous tiue of the ala, and the interval bet ween each 

 greater alar and lateral cart ilage is more or less completely filled by one or more small 

 plates, sesamoid cartilages (fig. 7(>4). The septal cartilage (fit:. 707) fits 

 into the triangular interval of the bony septum. It,- WDOiaf Imnlir is 



attached to the dorsal border of the internasal suture. Inferior to the nasal bone it 

 presents a shallow groove which gradually narrows towards the tip of the nose, and 

 whose borders are continuous superiorly with the lateral nasal cartilages, but are 

 separated from their inferior two-thirds by a narrow slit. The most inferior part 



FIG. 767. MEDIAL WALL OP THE NASAL CAVITY, TIIK Mi cm - MKMHUAXK Br.ix<; REMOVED. 

 The dotted line indicates the course of tlie incisive (anterior palatine) canal. 



NASAL BONE Frontal linn* 



UPPER LATERAL CARTILAGE 



Groove between Beptal 

 and upper lateral 

 cartilage 



Sphenoidal BinuB 



LOWER LATERAL CARTILAGE 



THICKENED BORDER OF CARTILAGE RESTING 



UPON ANTERIOR NASAL SPINE Inciiive papilla 



SEPTAL CARTILAGE 



Pouch at upper 

 extremity ofln- 

 cisive canal 



ORIFICE OF TUBA AUOITIVA 

 SOFT PALATE 



of this border of the septal cartilage is placed between the greater alar cartilages. 

 The ventro-inferior bordtr extends dorsally from the rounded ventral angle to the 

 anterior nasal spine. Inferiorly it is attached to the medial crus of the greater alar 

 cartilage and to the mobile nasal septum. The dorso-superior border is attached to 

 the perpendicular plate of the ethmoid, and the dorso-injeriffr border joins the vomer 

 and the ventral part of the nasal crest of the maxilla, the cartilage broadening out 

 to obtain a wide though lax attachment to the nasal spine. The shape of the septal 

 cartilage varies with the extent of the ossification of the bony septum. Kven in the 

 adult a strip of cartilage may extend for a varying distance dorso-superiorly between 

 the vomer and perpendicular plate of the ethmoid, sometimes reaching the body of 

 the sphenoid and being known as the s/iln H;,lul /inx-inx of the septal cartilage. The 

 vomero-nasal cartilage is a narrow strip of cartilage firmly attached to each side of 

 the septal cartilage, where this joins the ventral portion of the vomer. 



The nasal septum is almost always straight in children and aboriginal skulls; but 

 in a large proportion of adults it is deflected to one side or the other. 



