THE INFERIOR TURBINATED BONES 



61 



posterior, thin and uneven, articulates with the os planum 

 of the ethmoid. The superior, the shortest and thickest, 

 articulates with the internal angular process of the frontal 

 bone. The inferior is divided by the lower edge of the vertical 

 crest into two parts the posterior part articulates with the 

 orbital plate of the superior maxillary bone; the anterior por- 

 tion is prolonged downward into a pointed process which 

 articulates with the lacrymal process of the inferior turbi- 

 nated bone and assists in the formation of the lacrymal canal 

 as described under external surface. 



FIG. 11 



Lacrymal 

 bone. 



Ethmoid al 

 process. 



Nasal proc. 



Sup. turbi- 

 nated crest. 



Lacrymal 

 proc. 



Inf. turbi- 

 nated crest. 



Inferior turbinated bone and lacrymal bone in situ. 



The Inferior Turbinated Bones 



The inferior turbinate or spongy bone projects like a shell 

 into the nasal cavity, separating the middle from the inferior 

 meatus. Its convexity looks in and its lower margin is rolled 



