112 



PR A CTICAL ANA TO MY. 



superior maxilla, the lachrymal, ethmoid, inner surface of superior maxilla, in- 

 ferior turbinated, vertical plate of palate bones, and inner surface of pterygoid 



PTERYGO- PALATINE CANALS 



FORAMEN OVALE 



PTERYGOID FOSSA 

 EXTERNAL PTERYGOID PLATE 



TUBEROSITY OF PALATE BONE 



INTERNAL PTERYGOID PLATE 



HAMULAR PROCESS 



SPINE OF PALATE OR POSTERIOR 

 NASAL SPINE 



FIG. 73. THE POSTERIOR NARK. 



NASAL BONE Frontal sinus 



Sphenoidal sinus 



UPPER LATERAL CARTILAGE 



Groove between septal 

 and upper lateral 

 cartilage 



LOWER LATERAL 



THICKENED BORDER OF CARTILAGE RESTING 



UPON ANTERIOR NASAL SPINE Incisive papilla \ extremity ( 



SEPTAL CARTILAGE 8on ' 8 oanal 



ORIFICE OF EUSTACHIAN 



TUBE 

 SOFT PALATE 



FIG. 74. SECTION SHOWING BONY AND CARTILAGINOUS SEPTUM. 

 The dotted line indicates the course of the anterior palatine canal. 



process of the sphenoid bone. This surface is covered by mucous membrane. 

 This must be studied on the dry skull. 



The anterior nares is the inlet to the nose from the external world. The 



