50 



Bones of the Trunk. 



Sup. 

 Artic.vrocess 



63, Outline of a Dorsal Vertebra. 



The 12 dorsal vertebrae are marked by articular demi-facets 

 covered with cartilage, at the side of the body, of which there is one 

 at the upper, one at the lower border; witli the neighbouring vertebrae 

 they form the Fowac, articularc.s for the heads of the ribs. The vertebral 

 foramen circular, the spinous processes long, directed obliquely down- 

 wards , especially at the middle dorsal vertebrae. The transverse pro- 

 cesses have anteriorly articular surfaces, covered with cartilage, for the 

 tubercles of the ribs. Tubercula co*t<iri<iti. 



Sup.Artic.-proc. 



Facctf.t 

 I. rib 



Facet ft. -tubercle 

 of't.rib 



64. The First Dorsal Vertebra, side view. 



The first dorsal vertebra has on the side of the body an 



upper articular facet for the head of the first rib (sometimes the articular 



facet is formed jointly with the seventh cervical vertebra) and a demi- 

 facet for the second rib. 



