Where does lymph fluid drain in order to go back into the cardiovascular system?
Lymph (from Latin, "lympha" meaning "water") is the fluid that flows through the lymphatic system, a system composed of lymph vessels (channels) and intervening lymph nodes whose function, like the venous system, is to return fluid from the tissues to the central circulation. Interstitial fluid – the fluid which is between the cells in all body tissues – enters the lymph capillaries. This lymphatic fluid is then transported via progressively larger lymphatic vessels through lymph nodes, where substances are removed by tissue lymphocytes and circulating lymphocytes are added to the fluid, before emptying ultimately into the right or the left subclavian vein, where it mixes with central venous blood.
Which veins does lymph fluid drain in order to go back into the cardiovascular system?
right subclavian vein right or the left subclavian vein left subclavian vein
Lymph
The flow of lymph in the thoracic duct in an average resting person usually approximates 100ml per hour. Accompanied by another ~25ml per hour in other lymph vessels, the total lymph flow in the body is about 4 to 5 litres per day. This can be elevated several fold while exercising. It is estimated that without lymphatic flow, the average resting person would die within 24 hours.
Which duct does lymph fluid drain in order to go back into the cardiovascular system?
thoracic duct
Lymph
Lymph
https://en.wikipedia.org/wiki/Lymph
In order to return to the cardiovascular system, lymph fluid flows through the lymphatic system, in a  process that takes it though the thoracic duct, from where it then drains into the right or the left subclavian vein, where it finally mixes with central venous blood.