To prevent the accumulation of excessive interstitial fluid especially in the lung. In the absence of lymphatic obstruction lymph flow can increase 20 to 50 times to remove excess fluid accumulation.
Lymph fluid is carried into the thorax and enters the subclavian veins to flow into the cranial vena cava and right atrium.
These vessels continuously remove interstitial fluid and prevent its excessive accumulation.
Out of the lymphatic vessels