Bony portion of 

 the body 



THE AXIAL SKELETON 

 ,Eony portion of the arch 



Epiphysis of the body 



FIG. 70 FIRST LUMBAR VERTEBRA 

 OF A NEW-BORN CHILD. 



Rudiment of a cervical rib 



FIG. 72. THE SEVENTH CERVICAL VERTEBRA 

 OF A NEW-BORN CHILD. 



Centre of ossification of 

 the anterior arch 



35 



.Epiphysis of the 



articular process 



Epiphysis of the costal 

 process 



.Epiphysis of the 

 spinal process 



Vi 



FIG. 71. FIRST LUMBAR VERTEBRA IN THE 

 EIGHTEENTH YEAR. 



Cartilaginous epiphysis 

 of the odontoid process 



.Upper centre of ossifica- 

 tion of the body 



FIG. 73. THE ATLAS AT THE END 

 OF THE FIRST YEAR. 



Lower centre of ossifica- 

 tion of the body 



FIG. 74. THE Axis AT THE END 

 OF THE FIRST YEAR. 



Centre of ossification y- 



of the epiphysis of 

 the odontoid process 



FIG. 75. THE ATLAS IN THE FOURTH YEAR. 



FIG. 76. THE Axis IN THE FOURTH YEAR. 



Centres of ossification 

 of the lateral mass 



First sacral vertebra 

 Vertebra sacralis I. 



Primitive cartilage 



First coccygeal vertebra 

 Vertebra coccygea I. 



FIG. 77. SEEN FROM BEFORE. FIG. 78. SEEN FROM BEHIND. 



Development of the Vertebrae : The centres of ossification in the sacrum and coccyx of 



a child at the age of two months. 



52 



Centres of ossi- 

 fication of the 

 vertebral arches 



- Centres of ossi- 

 fication of the 

 vertebral bodies 



