Lymphatic System - Circulation
Approximately 99% of the fluid (water) that leaves capillaries at the arteriole end is normally reabsorbed at the venules end. But what about the remaining 1 per cent fluid left in the interstitial spaces?
Figure: Lymph vessels of the human body
Vertebrate animals have a special system of vessels, the lymphatic system that drains fluid from interstitial spaces in the tissues and returns it to the blood, thus maintaining balance between blood volume and interstitial fluid volume in the body.