224 



THE SKELETON 



C 1 



L 1 



Fig. 84 — Si>inal column; A, side view; ij, rear 

 view ; C, 1-7, cervical vertebiiv ; D, 1-12, dor- 

 sal vertebras ; X, 1-5, lumbar vertebraj ; S^ sac- 

 nun ; Co^ coccyx. 



bones that compose 

 the column and those 

 that frame the thor- 

 acic and abdominal 

 cavities are spoken 

 of collectivelj' as the 

 axial skeleton. The 

 bones which form the 

 appendages (arms and 

 legs) are called the ap- 

 pendicular skeleton. 



The Axial Skele- 

 ton. 



The spinal coltimn. 



— The bones that 

 make up this long, 

 curved column are 

 called the vertebrae. 

 These vertebrae are 

 twenty-four in num- 

 ber and are divided 

 into three regions. 

 The seven nearest 

 the skull are called 

 cervical vertebrae and 

 constitute the cervi- 

 cal or neck region. 

 The next twelve are 

 called the dorsal ver- 

 tebra^ and carry the 



