THE TURBINATED BONE 



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The Turbinated Bone (Concha Nasalis Inferior). 



The turbinated bones are situated one on each side of the outer wall of the nasal 

 fossa 1 . Each consists of a layer of thin, spongy bone, curled upon itself like a 

 scroll hence its name "turbinated" and extends horizontally along the outer 

 wall of the nasal fossa, immediately below thevorifice of the antrum (Fig. 81). 

 Each bone presents two surfaces, two borders, and two extremities. 



NASOPHARYNGEAL 

 MEATUS 



FIG. 81. Nasal cavity, right lateral wall, from the left. (Spalteholz.) 



Surfaces. The internal surface (Fig. 82) is convex, perforated by numerous 

 apertures, and traversed by longitudinal grooves and canals for the lodgement 

 of arteries and veins. In the recent state it is covered by the lining membrane of 

 the nose. The external surface is concave (Fig. 83), and forms part of the inferior 

 meatus. 



FIG. 82. Right turbinated bone. Internal surface. FIG. 83. Right turbinated bone. External surface. 



Borders. Its upper border is thin, irregular, and connected to various bones 

 along the outer wall of the nose. It may be divided into three portions; of these, 

 the anterior articulates with the inferior turbinated crest of the maxilla; the poste- 

 rior with the inferior turbinated crest of the palate bone; the middle portion of the 



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