THE ABSORBENT SYSTEM in 



vessels. Opposite the 4th dorsal vertebra it passes to the left 

 behind aortic arch, and runs along the left side of the oeso- 

 phagus, behind the left common carotid artery. At the level 

 of the yth cervical vertebra it turns outwards, and passing 

 behind left internal jugular and crossing ist part of left sub- 

 clavian artery, archies over the apex of the left pleura to 

 open at the angle of union of the left internal jugular and left 

 subclavian veins. 



The right lymphatic duct : receives the absorbents of the 

 right limb, right side of chest, right half of head and neck, 

 and upper surface of liver. It is about ^ inch long, and 

 enters the venous system at the angle of union of the right 

 internal jugular and right subclavian veins. 



THE LYMPHATICS OF THE HEAD AND NECK. 



Suboccipital glands (i or 2) : receive lymphatics from back 

 of scalp, efferent vessels join superficial cervical glands. 



Mastoid glands (2 or 3) : receive lymphatics from back of 

 ear and external auditory meatus, efferent vessels join super- 

 ficial cervical glands. 



Parotid lymphatic glands (3 or 4) : one being placed just 

 anterior to tragus. Receive lymphatics from temporal region, 

 external auditory meatus and eyelids ; efferent vessels pass to 

 submaxillary and superficial cervical glands. 



Internal maxillary glands: afferent vessels from temporal, 

 nasal, zygomatic, and orbital fossae, palate and upper part of 

 pharynx; efferent vessels pass to superior deep cervical 

 glands. 



Submaxillary lymphatic glands (8 to 10) : afferent vessels 

 from face, floor of mouth, submaxillary and lingual glands ; 

 efferent vessels to cervical glands. 



Superficial cervical glands (4 to 6) : placed along the ex- 

 ternal jugular vein. Afferent vessels from external ear, skin 

 of neck ; efferent vessels to the deep cervical glands. 



Deep cervical glands (20 to 30) : glandulas concatenate. 



Superior: lie along internal jugular vein from division of 

 common carotid to base of skull. Afferent vessels from in- 

 ternal maxillary and submaxillary glands, cranium, tongue, 

 larynx, lower part of pharynx and thyroid body. Efferent 

 vessels to inferior set. 



Inferior: placed along lower part of internal jugular vein. 

 Afferent vessels from other cervical glands and lower part of 

 neck. Efferent vessels form a single trunk {Jugular lymphatic 

 trunk), opening into thoracic duct on left side, and into the 

 right lymphatic duct on right side. 



