The thoracic duct essentially collects the lymph from the lower right part of the body, from the GI system and from the left side of the body, the entire left side of the body. And it connects with our circulation system via the left subclavian vein. So this is the bronchiocephalic vein, this is the right subclavian vein and this is the left subclavian vein. Remember, the subclavian veins carries the deoxynated blood from the arm portion and into the vena cava which brings that blood to the right atrium of our body. And along the right subclavian vein, we have a connection between that vein and the right lymphatic duct. While along this left subclavian vein we have a connection between this thoracic duct and the left subclavian vein.