300 THE VASCULAR SYSTEMS 



The deep hepatic lymphatics accompany the portal and 

 hepatic veins. The former join the other vessels from the 

 under surface at the transverse fissure, and traverse some 

 small hepatic nodes to join the celiac nodes. Those accom- 

 panying the hepatic veins form five or six trunks piercing 

 the diaphragm, and join the glands around the vena cava. 



THE LYMPHATIC SYSTEM OF THE THORAX 



This is composed of six to ten internal mammary or sternal 

 nodes along the course of the vessels. 



Along the line of the heads of the ribs, on each side of the 

 spine, are the intercostal nodes. They send vessels to both 

 the thoracic and right lymphatic ducts. 



Several anterior mediastinal nodes lie between the sternum 

 and the pericardium. 



Eight or ten superior mediastinal or cardiac nodes, around 

 the great vessels, receive the lymphatics of the heart and 

 thymus gland. 



Numerous bronchial nodes, between the bronchi and along 

 their primary divisions, receive the lymphatics of the lung. 

 They deepen in color as age advances. 



Ten or twelve posterior mediastinal nodes, along the esophagus 

 and aorta. 



The deep lymphatics of the chcxt trail are an anterior set, 

 in the intercostal spaces, joining the internal mammary nodes, 

 and a posterior or intercostal set, along with the intercostal 

 vessels, joining the intercostal nodes. 



The cardiac lymphatics run toward the base of the heart, 

 and form a trunk on each side. Of these, the right enters a 

 node above the aortic arch the left, the nodes behind that 

 vessel. 



The pulmonary Iynij)hatics, superficial and deep, end in the 

 bronchial nodes. 



The csophageal lymphatics form a plexus between the muscular 

 and mucous coats and join the posterior mediastinal nodes. 



The thymic lymphatics enter the superior mediastinal nodes. 



