College of Massage Therapists of British Columbia (CMTBC) Practice Exam

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Where do the lymphatic vessels drain into the venous system?

Right Atrium
Internal Jugular Vein and Subclavian Vein
Hepatic Vein
Common Iliac Vein

The correct answer is: Internal Jugular Vein and Subclavian Vein

The lymphatic vessels drain into the venous system at the junction of the internal jugular vein and the subclavian vein. This anatomical union is significant because the lymphatic system plays a crucial role in returning excess interstitial fluid back to the bloodstream, as well as facilitating the transport of fats and immune cells. At this junction, lymph is emptied into the venous system, which allows it to mix with the blood and maintain homeostasis within the body. The right lymphatic duct drains lymph from the right upper quadrant of the body into the right subclavian vein, while the thoracic duct drains lymph from the rest of the body into the left subclavian vein, which is a vital aspect of the lymphatic circulation process. Understanding this drainage point is essential for recognizing how the lymphatic system contributes to overall fluid balance and immune responses in the body.