32 



ANATOMY FOR NURSES. 



[CHAP. IV. 



FIG. 28. VOMER. Side view. 



The vomer is a single bone 

 placed at the back part of the 

 nasal cavity, and forms part of 

 the septum of the nose. It is 

 thin, and shaped somewhat like 

 a plough-share, but varies in 

 different individuals, being frequently bent to one or the other 

 side. 



Flat bones of the trunk : 



Scapula, shoulder-blade 2 



Os innominatum, haunch-bone 2 



Sternum, breast-bone 1 



Ribs 24 



Patella _2 



31 



The scapula, or 

 shoulder-blade, is a 

 large flat bone, tri- 

 angular in shape, 

 placed between the 

 first and eighth ribs 

 on the back part of the 

 thorax, where it affords 

 considerable protection to 

 the lungs. It is unevenly 

 divided by a very prominent 

 ridge, the spine of the scapula, 

 which terminates in a large trian- 

 gular projection called, from the 

 Greek, acromion process, or summit 

 of the shoulder. Below the acro- 

 mion process, and at the head of the 

 shoulder-blade, is a shallow socket, 

 the glenoid cavity, which receives 

 the head of the humerus. 



The sternum, or breast-bone, is a 

 flat narrow bone, situated in the 



median line in the front of the chest, , FIG 29.- SCAPULA inner sur- 



face. 7, glenoid cavity ; 9, end of 



and consisting, in the adult, of three spine; 10, acromion process. 



