70 



THE HUMAN BODY. 



being directed upwards and articulating with the under 

 surface of the body of the fifth lumbar vertebra. On its 

 sides are large surfaces to which the arch bearing the lower 



Pni 



Pa 



* 



FIG. 24. A lumbar vertebra seen from the left side. Ps, spinous process; Pas, 

 anterior articular process; Pai, posterior articular process; Pt> transverse process. 



Fsa 



FIG. 25. The last lumbar vertebra and the sacrum seen from the ,entral side. 

 Fsa, anterior sacral foramina. 



limbs is attached (see Fig. 16). Its ventral surface is con- 

 cave and smooth and presents four pairs of anterior sacral 



