60 



DISSECTION OF THE DOG 



Dorsally in contact for the greater part of its course with the bodies of the 

 thoracic vertebrae, the aorta is ventrally in successive relation to the root of the 

 left lung, the pericardium, and finally the diaphragm. 



subckwia sinistra - 



v. anonyma sinistra. 



'.gulans externa 

 sinistra 



--Truncus jugularis 



Ductus thoracicas 



Aorta 1- 



A 



Fig. 23. — Diagram of the thoracio duct. 



