BONES OF THE HEAD 



69 



supported by the stylohyoid ligaments attached to the 

 lesser cornua of each side.. The attachment of muscles 

 help to hold this bone in position and acts as a fixed 

 point for the muscles of swallowing and articulating. 

 Below it is attached to the larynx by the thyrohyoid 

 membrane. The hyoid bone can be felt just above 

 the Adam's apple (pomum Adami). It also affords 

 attachment to the muscles which lower the jaw, 

 depress the tongue, and aid as accessory muscles of 

 respiration. 



Orbital surface 

 Infraorbital groove " - , 



Inferiortetnporal 

 surfi 



Post, dental canals^ 

 Maxillary tubcrusity 

 Mi c process -- 



Fron t at process 

 ' f .Zacri/nal margin 



Jnfraoroital margin 

 Anterior surface 



Jnfraorbital foramen 

 ^,.- Canine fossa 

 - ' ' 'Palatine pro cess 



. . - .Ant. nasal spine 

 Alveolar process 



Right upper jaw bone, maxilla, from without. 



The Skull as a Whole. At birth the skull is large 

 in comparison with the other parts of the skeleton. 

 The face is small and equals only about one-eighth 

 of the bulk of the cranium, as compared to the size of 

 the face in the adult which equals about one-half of 

 the size of the skull. Ossification of the bones of the 

 skull in the infant is not complete; they are held together 

 by membranous tissue and these intervals between the 

 bones are termed fontanelles. There are six: Two, 



