30 



SURGICAL ANATOMY OF THE 



They are divided by the three turbinated bones. 



The superior meatus lies beneath the superior spongy 

 bone, and is the smallest, and has opening into it the 

 posterior, ethmoidal, and sphenoidal cells. At the back 

 is the spheno-palatine foramen, communicating with the 

 spheno-maxillary fossa. 



FIG. 2. 



a. Position of nasal duct. b. Orifice of Eustaohian tube. c. Orifice of Steno's 

 duct. d. Tonsil between pillars of fauces. 



The middle meatus lies beneath the middle spongy 

 bone, and has opening into it in front, the frontal sinus 

 (inftmdibulum), the anterior ethmoidal cells, and the 

 opening of the antrum, which is almost impossible to 

 find on the living body. (Vide Superior Maxillary 

 Region.) 



