272 ABSORBENT SYSTEM. 



coming from the anterior parietes of the abdomen, and proceed to 

 the axillary glands. 



The deep-seated set take divers directions and pass through 

 different sets of glands. The pectoral, which anastomose with 

 ramifications from the abdomen, follow the pectoral vein, and 

 reach one or two glands at the entrance of the chest. The inter- 

 costal spring from the pleura and intercostal muscles, accompany 

 the intercostal veins, pervade the internal dorsal glands, and ter- 

 minate by several branches in the thoracic duct. The lymphatics 

 of the Jieshy part of the diaphragm unite, some with the poste- 

 rior intercostal, others with the pectoral : those coming from the 

 crura run to the dorsal glands, where they anastomose with the 

 intercostal ; those from the chordiform tendon anastomose with 

 .the deep hepatic, run forward between the layers of mediastinum, 

 nearly to the heart, and enter the cardiac glands. 



2. Lymphatics of the Thoracic Viscera. 



The absorbents of the different organs contained within the 

 thorax, traverse one or several of the bronchial or cardiac glands, 

 and afterwards form divers branches which end in the thoracic 

 duct. The pulmonary lymphatics, very numerous, are distin- 

 guished into superficial and deep-seated. The first take their 

 rise from the surface of the lungs, creep along under their enve- 

 loping membrane, and make for one or more of the bronchial 

 glands. The deep set, which originate from the air-cells and 

 from the areolae of the parenchymatous tissue, follow the divisions 

 of the pulmonary veins, run to the root of the bronchial tubes, 

 there unite with the superficial, and perforate one or two of the 

 broncliial glands. 



The cardiac lymphatics derive their origin, either from the 

 surfaces (both exterior and interior) of the heart, or from the mus- 

 cular substance of the organ : they mount upon the curvature of 

 the posterior aorta, and disappear in the cardiac glands. 



The lymphatics of the superior part of the mediastinum and of 

 the esophagus join, some the intercostal, others the bronchial : 

 those coming from the anterior part of this membranous parti- 

 tion, from the thymus, trachea, and esophagus, unite either with 

 the pectoral, or else with the cardiac and anterior intercostal. 



3. Lymphatics of the Head. 



The lymphatics of the head form two planes, a superficial and 

 a deep one. The superficial pursue the course of the cutaneous 

 veins, and run in part into the sublingual, in part into the gut- 

 tural glands. The deep vessels, which come from the nostrils, 



