HEAD. 79" 



h. Cheeks. Two faces, on the internal the opening 

 of Stenon duct. Structure: skin, mucous membrane; 

 muscles, viz: the alveolo-labialis, and the masseter; 

 blood vessels, the maxillary, coronary and buccal 

 arteries ; nerves, the fifth and seventh pairs of cra- 

 nial nerves. 



c. Palate. Its face is covered with about twenty 

 furrows curved backwards. Structure : bone, the pa- 

 late and great maxillary; membranes, one fibrous, one 

 mucous ; vessels, the palato-labial artery ; nerves, fifth 

 pair of cranial nerves. 



d. Tongue. — Situated in the lingual canal and at- 

 tached to tlie hyoid apparatus. 



Hyoid apparatus, hyoid bone. — Formed of seven 

 pieces, a body and three branches. The body has an 

 anterior process or spur, and two lateral branches. It 

 is developed by three nuclei of ossification. The 

 branches; two small, with articular facets at both ex- 

 tremities ; two long, with faces smooth ; an anterior 

 and posterior border ; one inferior extremity articulated 

 with the middle nucleus or third branch ; one superior 

 articulated with the temporal bone. 



Muscles. — Five in pairs, and one single. 



1. Mylo-hyoideus. — Attached to mylo-hyoid line of 

 the inferior maxillary, to anterior appendix of the body 

 of the hyoid bone, which it eleva 



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