302 



THE RABBIT 



Examine the fifth thoracic vertebra and note the rounded centrum with 

 the neural arch dorsal to it, the long neural spine, the anterior and the 

 posterior zygapophyses, the transverse processes with the tubercular facet 

 on the under side of each, and, at the base of the neural arch, the facet for 

 the head or capitulum of the rib. 



Draw this vertebra viewed from the side and from in front. 



...-Neural spine 



Neural spine 



Facet for Transverse^process 

 Tub^rculum of Rib 



-Anterior 

 zygapophysis 



Posterior zygapophysis- 



A. 



■Facet for 

 Head of Rib 



Centrum- 



Fid. 101. — A. Right-side view ; and B. Anterior view of the Fifth Thoracic Vertebra 



of the Rabbit. 



3. The Lumbar Region. 



The lumbar vertebrae, usuall}'^ seven in number, are characterised by their 

 large size and the great development of their processes. The pre-zygapophyses 

 are borne on the inner sides of large metapophyses, while posteriorly the small 

 anapophyses overhang the intervertebral notches. In the first two lumbars 

 the centrum has a median ventral hypapophysis. They do not bear ribs. 



Examine and draw the second lumbar vertebra. Note the large transverse 

 processes, and the other parts as indicated above. 



Posterior zygapophysis 



Anapophysis'' 



Neural spine- 

 Metapophysis 



Anterior zygapophysis 

 Neural arch-- 



Centrum- 

 -•Transverse process. 

 Hypapophysis — -/ 



FiC4. 102.^ — A. Right-side view ; and B. Anterior view of the Second Lumbar 

 Vertebra of the Rabbit. 



4. The Sacral Region. 



This region consists of three or four vertebrae fused together to support the 

 pelvis. Usually they are large and bear at the sides a pair of wing-like expan- 

 sions, which support the pelvic girdle. A certain number of caudal vertebrae 

 are fused with the true sacral vertebrae (one or two) to form the composite 

 sacrum. 



