CHAPTER 11. 



EXTREMITIES. 



ANTERIOR OR THORACIC. 



OSTEOLOGY. 



Shoulder. 



Scapula. — Division : Two faces, three borders, tliree 

 angles. External face : Spine of omoplate or acro- 

 mion, its tuberosity, supraspinous and infraspinous 

 fossa, medullary foramen. Internal face : sub-scapular 

 fossa, two triangular surfaces. Superior border: 

 cartilage of prolongation. Anterior border : thin and 

 sharp. Posterior border: thick and concave. Cervical 

 angle, thin. Dorsal angle, thick. Humeral angle, 

 glenoid cavity, coracoid process with its tuberosity and 

 beak. 



Development : two nuclei of ossification. 



Arm. 



Humerus. — Division : A body and two extremities. 

 Body has four faces. Anterior face : smooth. Pos- 



