. The American journal of anatomy. ion takes place at the lower level of thebody of the 6th thoracic vertebra and the two branches uniteagain to form a single trunk at the upper level of the body ofthe 5th thoracic vertebra. In these 4 cases the lymphatics onthe left side of the aorta including the left duct, drain in a caudaldirection. Lymph glands are associated with the thoracic ductin cases 3, 4 and 5 (figs. 12-14). A further account of these willbe given in dealing with the variations. The arrangement of the two ducts in these 4 cases pointsto an originally double thoracic duct, as in cas
. The American journal of anatomy. ion takes place at the lower level of thebody of the 6th thoracic vertebra and the two branches uniteagain to form a single trunk at the upper level of the body ofthe 5th thoracic vertebra. In these 4 cases the lymphatics onthe left side of the aorta including the left duct, drain in a caudaldirection. Lymph glands are associated with the thoracic ductin cases 3, 4 and 5 (figs. 12-14). A further account of these willbe given in dealing with the variations. The arrangement of the two ducts in these 4 cases pointsto an originally double thoracic duct, as in case 2 (fig. 11). Thereis represented in these 4 cases another more advanced stagein the atrophy of the left duct. In case 2 there was a reductionin the size of the left duct, while in these 4 cases there is a reductionin size and a complete atrophy of a portion of the left duct. Thistype of duct occurred in 4 cases out of the 22, or in per cent. THORACIC DUCT IN MAN 223 InternalLeft Internal Jugular Vein /Jugular Trunk Collate. Internal Subclavian Trunk Jugular Trunk _ ^ . ^ €^ -^oubclavian Trunk Left Internal Jugular Left^\^ 1st Thoracic Vertebr^^^^^i!?r^sli!!l^Subclavian VplVi Left Innominate Vein Thoracic Duct ollaterals isterna Chyli Right Lumba Lymphatics Lymphatics 14
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
