LYMPHATICS OF THE VISCERA. 357 



The Intercostal lymphatic vessels follow the course of the arteries of the 

 same name ; and reaching the vertebral column curve downwards, to ter- 

 minate in the thoracic duct. 



The Internal mammary lymphatics commence in the parieties of the 

 abdomen, communicating with the epigastric lymphatics. They ascend 

 by the side of the internal mammary vessels, being joined in their course 

 by the anterior intercostals, and terminate at the root of the neck, on the 

 right side in the tributaries of the ductus lymphaticus dexter, and on the 

 left in the thoracic duct. The diaphragmatic lymphatics pursue the direc- 

 tion of their corresponding veins, and terminate some in front in the in- 

 ternal mammary vessels, and some behind, in the posterior mediastinal 

 lymphatics. 



The Deep lymphatic glands of the abdomen are the lumbar glands ; they 

 are very numerous, and are seated around the common iliac vessels, the 

 aorta and vena cava. 



The deep lymphatic glands of the pelvis are the external iliac, internal 

 iliac and sacral. 



The External iliac are placed around the external iliac vessels, being 

 in continuation by one extremity with the femoral lymphatics, and -by the 

 other with the lumbar glands. 



The Internal iliac glands are situated in the course of the internal iliac 

 vessels, and the sacral glands are supported by the concave surface of the 

 sacrum. 



The Deep lymphatic vessels are continued upwards from the thigh, be- 

 neath Poupart's ligament, and along the external iliac vessels to the lum- 

 bar glands, receiving in their course the epigastric, circumflexa ilii, and 

 ilio- lumbar lymphatic vessels. Those from the parietes of the pelvis, and 

 from the gluteal, ischiatic, and obturator vessels, follow the course of the 

 internal iliac arteries, and unite with the lumbar lymphatics. And the 

 lumbar lymphatic vessels, after receiving all the lymphatics from the lower 

 extremities, pelvis, and loins, terminate by several large trunks in the 

 receptaculum chyli. 



LYMPHATICS OF THE VISCERA. 



The Lymphatic vessels of the lungs are of large size, and are distributed 

 over every part of the surface, and through the texture of these organs ; 

 they converge to the numerous glands situated around the bifurcation of 

 the trachea and roots of the lungs, the bronchial glands. Some of these 

 glands of small size, may be traced in connexion with the bronchial tubes 

 for some distance into the lungs. The efferent vessels from the bronchial 

 glands unite with the tracheal and cesophageal glands, and terminate prin- 

 cipally in the thoracic duct at the root of the neck, and partly in the duc- 

 tus lymphaticus dexter. The bronchial glands, in the adult, present a 

 variable tint of brown, and in old age a deep black colour. In infancy 

 they have none of this pigment, and are not to be distinguished from lym- 

 phatic glands in other situations. 



The Lymphatic vessels of the heart originate in the subserous areolar 

 tissue of the surface, and in the deeper tissues of the organ, and follow 

 the course of the vessels, principally, along the right border of the heart 

 to the glands situated around the arch of the aorta and to the bronchia] 



