Into which venous angle does the thoracic duct drain in the described drainage pathway?

• A. Left Venous Angle
• B. Right Venous Angle
• C. Both
• D. None

Answer: (A)

The drainage site in question is where lymph re-enters the venous system after traveling through the thoracic duct. The thoracic duct, which collects lymph from most of the body, typically empties into the left venous angle—the junction of the left internal jugular and left subclavian veins. This left-sided termination is what ties the majority of lymph return to the systemic circulation. In contrast, the right lymphatic duct drains lymph from the right head, thorax, and upper limb into the right venous angle (the junction of the right internal jugular and right subclavian veins). So, the described pathway for the thoracic duct ends at the left venous angle.