Thoracic duct opens into
In the neck, it arches laterally at the level of the transverse process of seventh cervical veebra. Finally it descends in front of the first pa of the left subclan aery and ends by opening into the angle of junction between the left subclan and left internal jugular veins ( both these left subclan and left internal jugular vein drains into left brachiocephalic vein ) <img src=" /> Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 1, pg. no. 302
Subclan vein
Internal jugular vein
Right brachiocephalic vein
Left brachiocephalic vein
Thorax