The term "Vena Subclavia" refers to a large vein located in the upper body that is responsible for draining blood from the arms and shoulders back into the heart. Synonyms for this vein include the subclavian vein, subclavian vein system, and the axillary vein. Other related veins in the area include the jugular vein, brachiocephalic vein, and the superior vena cava. Understanding the various veins and their functions in the body can help health professionals diagnose and treat medical conditions related to circulation or blood flow issues in the upper body.