THE THORACIC VERTEBRAE 



55 



Tenth Thoracic Vertebra. The tenth thoracic vertebra has (except in the 

 case just mentioned) an entire articular facet on each side, above, which is partly 

 placed on the outer surface of the pedicle. It has no demi-facet below. Some- 

 times it has no facet on its transverse process. 



f An entire facet above; 

 \ a demi-facet below. 



A demi-facet above. 



One entire facet. 



(An entire facet, 

 facet on rue 

 ransverse process 



iN facet on rudimentary 

 tr 



An entire facet. 



f No facet on trans- 

 verse process. 

 Inferior articulat 

 process, convex 

 and turned out- 

 ward. 



FIG. 20. Peculiar thoracic vertebrae. 



Eleventh Thoracic Vertebra. The body of this vertebra approaches in its 

 form and size that of the lumbar vertebra?. The articular facets for the heads 

 of the ribs, one on each side, are of large size, and placed chiefly on the pedicles, 

 which are thicker and stronger in this and the next vertebra than in any other 

 part of the thoracic region. The spinous process is short, and nearly horizontal 

 in direction. The transverse processes are very short, tubercular at their extrem- 

 ities, and have no articular facets for the tubercles of the ribs. 



