THORAX. 149 



Veins. — Cardiac or coronary. — The small cardiac 

 empties from the walls of the right ventricle into the 

 right auricle. The great cardiac empties also into the 

 right auricle inside of the opening of the posterior vena 

 cava, after receiving the bronchial veins. 



Anterior vena cava. — Formed by the two jugulars 

 and the two axillary veins, terminates on top the right 

 auricle, receiving in its course the internal mammary, 

 the vertebral, the superior cervical, the dorsal and the 

 great vena azygos, which last receives the first lumbar 

 and intercostal veins. 



Posterior vena cava. — See description of the ab- 

 domen, page 172. 



Lymphatics. — Those of the thoracic cavity consist of 

 three ganglions: 1 — A series of small granulations 

 placed near the oesophagus and receiving the posterior 

 lymphatics of this organ ; 2 — The bronchial ganglions, 

 situated at the bifurcation of the trachea and receiving 

 the pulmonary lymphatics ; 3 — Two long masses of 

 lobules at the inferior face of the trachea, into whicli 

 the lymphatics of the pericardium, heart and a part of 

 those from the trachea and oesophagus empty. The 

 lymphatics of the tlioracic walls are : 1 — A mass of 

 small granules on each side of the dorsal column ; 2 — 

 A large mass at the base of the xyphoid appendix ; 

 3 — Some small ones attached to the thoracic vessels. 



