THE SKELETON 



55 



The Lumbar Vertebrae (Fig. 25) are the largest of all the mov- 

 able vertebrae and have no ribs attached to them. Their spines are 

 short and stout and lie in a more horizontal plane than those of the 



Pas 



Pa 



ai 



FIG. 25. A lumbar vertebra, seen from the left side. Ps, spinous process; 

 Pas, anterior articular process; Pai, posterior articular process; Pt, transverse 

 process. 



FIG. 27. 

 The coccyx. 



FIG. 26. The last lumbar vertebra and the sacrum seen from the ventral side. 



vertebrae in front. The articular and transverse processes are also 

 short and stout. 



The Sacrum, which is represented along with the last lumbar 



