42 



THE AXIAL SKELETON 



Epiphysis of the tubercle 

 / Epiphysis tubercnli 



Epiphysis of the head 

 Epiphysis capituli 



FIG. 91. POSTERIOR PORTION OF THE SIXTH 

 RIB, IN THE FIFTEENTH YEAR. 



Epiphysis of the head 

 , Epiphysis capituli 



Epiphysis of the 

 articular facet of 

 / the tubercle 



Tubercle of the rib 

 ," Tuberculum costse 



FIG. 92. POSTERIOR PORTION OF THE SIXTH 

 RIB, IN THE EIGHTEENTH YEAR. 



FIG. 93. DIVIDED PRIMI- 

 TIVE CARTILAGE OF THE 

 STERNUM. 



From a human foetus of two 

 months (months of four 

 weeks each). 



FIG. 94. PRIMITIVE CARTILAGE 

 OF THE STERNUM. 



From a human foetus of four months 

 (months of four weeks eachV 



FIG. 95. PRIMITIVE CARTILAGE 

 OF THE STERNUM WITH THE 

 FIRST CENTRE OF OSSIFICA- 

 TION IN THE MANUBRIUM. 



From a human foetus in the second half 

 of the sixth month (months of four 



weeks each). 



FIG. 96. CENTRES OF OSSIFICATION IN THE 

 STERNUM OF A NEW-BORN CHILD. 



FIG. 0.7. STERNUM OF A BOY AT THE 

 AGE OF ELEVEN YEARS. 



Development of the Ribs and the Sternum. 



