THE HEART AND VASCULAR SYSTEM. 217 



LOWER EXTREMITY AND PELVIS. The superficial lymphatic 

 vessels from the back of the foot follow the course of the long 

 saphenous vein, passing to the superficial inguinal glands; and 

 those from the sole of the foot follow the short saphenous vein, 

 joining the deep set in the popliteal space. The deep lymphatic 

 vessels follow the deep veins, traverse two to four popliteal glands, 

 and join the deep inguinal glands. The deep lymphatic glands 

 in the pelvis consist of three sets : the external iliac, around the 

 external iliac vessels; the internal iliac, around the internal iliac 

 vessels; and the sacral glands, on the anterior surface, and in the 

 mesorectal fold?. 



LYMPHATICS OF THE ABDOMEN. The lymphatic vessels of 

 the external and internal iliac glands enter the lumbar glands, 

 twenty-five or more in number, situated upon the vertebrae, the 

 origin of the diaphragm, the. psoas and quadratus lumborum mus- 

 cles, and the great blood-vessels. They receive vessels from the 

 kidneys, ureters, loins, suprarenal bodies, ovaries, and testicles, 

 and form lumbar lymphatic trunks, which ascend to join the tho- 

 racic duct or receptaculum chyli. The lymphatic vessels of the 

 si i nn a ch follow the general course of the blood-vessels. They 

 consist of three groups : the first, along the lesser curvature, pass- 

 inir to the glands along the pylorus; the second, at the great end 

 of the stomach, passing to the splenic lymphatic glands ; and the 

 third, at the greater curvature, passing to one of the principal 

 lacteal vessels. The lymphatics of the small intestine are called 

 also lacteals. They pass between the layers of the mesentery 

 and traverse a large number of mesenteric glands, arranged 

 irregularly into three rows. The lymphatic vessels of the large 

 inli'slinc traverse the mesocolic glands, about thirty in number, 

 and pass into the superior mesenteric glands. The vessels from 

 the spleen and pancreas follow the course of the splenic vein, 

 traverse a number of the glands, to end in the coeliac glands. 

 The lymphatics of the liver consist of superficial and deep, and 

 are very extensive, both on the upper and lower surfaces. They 

 terminate in the right lymphatic duct, the glands of the gastro- 

 hepatic omentum, the anterior mediastinal glands, the cesophn- 

 ge:il Clauds, the glands of the lesser curvature, and of the thoracic 

 duct. The deep lymphatics follow the course of the portal vein 

 and hepatic artery and duct, and, emerging, join one of ihe 

 lacteal vessels before it enters into the thoracic duct. The cu'liur 

 glands, fifteen or twenty in number, are situated behind the pan- 

 creas and duodenum, the aorta, portal vein, coeliac. and superior 

 meseuierie vessels. Their eU'erent vessels form the intestinal 

 lymphatic trunk and empty into receptaculum chyli. 



