THE SKELETON 



15 



Fig. I. — Relative positions of the various bones of the cranial half of the 

 skeleton. AT, atlas; AX, axis (epistropheus); C, clavicle; CA, carpus; D, 

 digits II-V; H, humerus; IF, intervertebral foramen; L, first lumbar vertebra; 

 MC, metacarpals II-V; OC, occiput; OP, olecronal process of ulna; P, pollex, 

 PB, pisiform bone; R, radius; S, scapula; SP, spinous process; ST, sternum, TP, 

 transverse process; U, ulna. 



A. THE SKELETON AS A WHOLE 



The adult skeleton is conveniently divided into an axial 

 and an appendicular part which are subdivided for convenience 

 in studying. 



