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LYMPHATIC VESSELS OE THE HEAD AND NECK. 333
descend the neck and follow the conrse of the veins and carotid artery.
At the same time they [)rugressively decrease in numbers. Those on the
right side empty by a short trunk into the right lymphatic duct, which
enters the venous circulation at the junction of the right internal jugu-
lar and subclavian veins. Those on the left side enter the main tho-
racic duct.