The lymph reenters the vascular circulation at

the left brachiocephalic trunk, at the junction of the left subclavian and the left internal jugular veins.

Explanation:

The lymph is collected throughout the body through the lymphatic system. Most of the lymph re enters the bloodstream through the thoracic duct (left lymph duct). The only exception here is the lymph coming from the right superior quadrant.

what's the question?

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jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.