THE NOSE 



89o 



Fig. 518.— Section- of the Xcse, showing the Tuebixal Bones and Meatises, 

 WITH the Openings ix Dotted Outline. 



Orifice of middle ethmoidal cells 

 SUPERIOR TURBiNAL BONE 

 Oriflee of the posterior ethmoidal cells 

 Orifice of the sphenoidal sinus 

 Sphenoidal sinus 



Frontal sinus 



Orifice of frontal sinus 



UPPER ORIFICE OF 

 NASAL DUCT 



ORIFICE OF EUSTACHIAN 

 TUBE 

 MIDDLE TURBINAL BONE 



LUAER ORIFICE OF NASAL DUCT 



l.'<F£RIOR TURBiNAL BONE ORIFICE OF THE ANTRUM ORIFICE OF INFUNDIBULUM 



Fig. 519.— Transverse Section passing through the Nasal Foss^ and Avtr\ \t the 

 Posterior Extremity of the Middle Turbinal Bone. (Seen from the front.'; 



Frontal sinuses < 



MIDDLE TURBINAL 

 BONE 



RIGHT ANTRUM — >? J-^"- >-. 



INFERIOR TURBINAL ''•^^^^^ 

 BONE 



