The thoracic and right lymphatic ducts return lymph to the ______.
Subclavian veins
The vessels draining the right half of the thorax, neck and head join to form a duct called the right lymphatic duct which empties into the right subclavian vein.
All of the vessels draining the rest of the body join to form thoracic duct present in the left half of the body. The thoracic duct also has several valves and eventually drains into the left subclavian vein. Subclavian veins, like any other vein in the body, carry blood to the heart.