THE NOSE 



1353 



This fact explains the severity of epistaxis, and, together with the drainage of 

 blood into out-of-the-way veins, such as the spheno-palatine and ethmoidal, 



Fig. 1098. — Section of the Nose, showing the Concha (Turbinate Bones) and Meatuses 

 WITH THE Openings in Dotted Outline. 



Frontal sinus 



Orifice of middle ethmoidal cells / 



/ ^\ ,, 



Superior concna / -^ — T^. \ \ 



Orifice of the posterior ethmoidal cells 



Orifice of the sphenoidal sinus 

 Sphenoidal sinus 



Orifice of tuba auditiva 



fice of frontal sinus 



Upper orifice of 

 naso-lacrimal 

 duct 



Middle concha 



Lower orifice of naso- 

 lacrimal duct 



Inferior concha Orifice of the Orifice of infundibulum 

 maxillary sinus 



Fig. 1099. — Section showing Bony and Cartilaginous Septum. 

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

 Nasal bone Frontal sinus 



Sphenoidal sinus 



Lateral nasal cartilage 



Groove between septal 

 and lateral nasal 

 cartUage 



Greater alar cartilage 



Thickened border of cartilage , mcisive canai / ^ ■/- , ^ i_ j-^- 



resting upon anterior nasal spine Incisive \ xin,isive i,ancn j Onfice of tuba auditiva 



papilla Septal cartilage Soft palate 



accounts for the serious results which ma}^ follow on a firmly impacted and in- 

 fected plug. The boundaries of the posterior nares have been given above. 



