subclavian lymph trunk subclavian lymph trunk the efferent vessels of the subclavicular group unite to form the subclavian trunk, which opens either directly into the junction of the internal jugular and subclavian veins or into the jugular lymphatic trunk; on the left side it may end in the thoracic duct. subclavian lymph trunkterminal collecting trunks of right side. a. jugular trunk. b. subclavian trunk. c. bronchomediastinal trunk. d. right lymphatic trunk. e. gland of internal mammary chain. f. gland of deep cervical chain.detailssystemlymphatic systemsourceaxillary lymph nodesdrains tothoracic duct, right lymphatic ductidentifierslatintruncus subclaviusta98a12.4.01.003ta25134, 5141fma12252anatomical terminology