50 



THE HUMAN BODY 



FIG. 17. The bony and cartilaginous 

 skeleton. 



Fio. 18. Side view of 

 the spinal column. C 17, 

 cervical; D 1-12, dorsal; 

 L 1-5, lumbar; S 1, sacrum; 

 Co 1-4, coccygeal. 



