6o 



ELEMENTS OF PHYSIOLOGY 



turns white, thus reminding us of the temporary nature 

 of life. What bones receive their name because of 

 this ? 



100. The Bones of the Face are fourteen in number, 

 twelve being in symmetrical pairs, and two unpaired : the 

 two malar bones forming the prominences of the cheeks ; 



two nasal 

 bones, small 

 and slender, 

 forming the 

 bridge of the 

 nose ; two up- 

 per maxillary 

 bones, form- 

 ing the upper 

 jaw; one in- 

 ferior maxil- 

 lary, the lower 

 jaw ; one vo- 

 mer, the bony 

 partition be- 

 tween the 

 nostrils ; two 

 lachrymal 



bones in the eye sockets ; two palate bones in the roof of 

 the mouth ; two turbinated bones in the interior of the 

 nose (Plate VII). Is any bone of the head movable upon 

 the others ? 



101. The Hyoid Bone, called also the tongue bone, is 

 U-shaped (this is the meaning of its name in Greek) and 

 lies in the front of the neck, where it may be felt above the 

 Adam's apple. Can you move it from side to side with 

 your hand (Figs. 51 and 129)? Does it feel rough or 

 smooth ? It forms points of attachment for numerous mus- 

 cles, the muscular tongue being attached to it above, 



FlG. 52. Bones of the Head. 



i, Frontal bone; 2, parietal bone; 3, temporal bone; 4, occipital 

 bone; 5, nasal bone ; 6, malar bone; 7, upper jaw; 8, lachrymal 

 bone ; 9, lower jaw (maxilla). 



