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Lymph trunk is a collection oflymph vessels that carries lymph, and is formed by confluence of manyefferent lymph vessels. It in turn drains into one of the two lymph ducts (right lymph duct and thethoracic duct).
When an efferent lymph vessel leaves a lymph node, it may carry lymph to anotherlymph node by becoming itsafferent lymph vessel or unite with other efferent vessels to become a lymph trunk. The lymph trunks drain into the lymph ducts, which in turn return lymph to the blood by emptying into the respectivesubclavian veins.[1]
There are five pairs and an unpaired lymph trunk: