60 



DISSECTION OF THE DOG 



DorsaUy 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. 



V. sitbdavia sinistra /_ 



3J. anonyma sinistra 1 



o 



_ y. jugularis externa 

 sinistra 



--Truncus jugularis 



Ductus thoracicus 



eO ^ 



"^ 



r^G. 23. — Diagram of the thoracic duct. 



