216 HUMAN ANATOMY. 



poral lymphatic vessels terminate in the anterior or auricular 

 glands. The lymphatics of the face are superficial and deep. 

 The superficial lymphatics are numerous, and terminate in the 

 submaxillary glands, six or more in number; the deep lym- 

 phatics accompany the branches of the internal maxillary artery, 

 and terminate in the deep cervical and deep parotid glands about 

 the ramus of the jaw. 



LYMPHATICS OF THE UPPER EXTREMITY. Lymphatics of 

 the upper extremity are composed of two sets, the superficial and 

 deep. The superficial lymphatic glands are few in number, one 

 or two only being situated at the internal condyle of the humerus. 

 The deep lymphatic glands lie along the course of the vessels, and 

 communicate with the axillary glands. All of these glands unite 

 in the deep axillary glands, about eight to ten in number, which 

 communicate with the deep cervical glands, and through them 

 empty into the subclavian lymphatic trunk, to end finally in the 

 thoracic or right lymphatic duct. The superficial and deep ves- 

 sels of the thorax, the former in the skin, the latter from the 

 mammary glands, pectoral and other muscles, for the most part, 

 pass to the axilla, a few only terminating in the glands below 

 the clavicle. 



THE CAVITY OF THE THORAX. The intercostal lymphatic 

 vessels, derived from the side of the abdomen and thorax, pleurae, 

 diaphragm, spinal canal, muscles of the back, etc., follow the 

 course of the veins, traverse fifteen to twenty intercostal glands 

 near the heads of the ribs, and terminate in the thoracic duct. 

 The posterior mediastinal glands are between the intercostal 

 glands, and communicate with them. They receive vessels from 

 the pericardium, oesophagus, and diaphragm. Some of the effer- 

 ent vessels end in the bronchial glands, others in the thoracic 

 duct. The anterior mediastinal lymphatic vessels are derived 

 from the anterior wall of the abdomen and thorax, the dia- 

 phragm, pericardium, upper surface of the liver, heart, and thy- 

 mus gland. They traverse about eighteen to twenty anterior 

 mediastinal glands,, situated in the course of the internal mam- 

 mary vein, pericardium, and great vessels of the heart, and 

 terminate in thoracic and right lymphatic ducts. The pulmo- 

 nary lymphatic vessels consist of a superficial and deep set, trav- 

 ersing in the last part of their course the pulmonary glands. 

 The bronchial glands are twenty or more glands at the bifurcation 

 of the trachea and root of the lungs, and receive the lymphatic 

 vessels of the lungs and bronchi. They become pigmented, and 

 are often the seat of disease. Their efferent vessels terminate on 

 the right side in the right lymphatic duct, either directly or by 

 forming the broncho-mediastinal trunk, and on the left side into 

 the thoracic duct. 



