The continual movement of fluid through the interstitial space functions to :

The continual movement of fluid through the interstitial space functions to :1) accelerate the distribution of nutrients and hormones;2) assist the transport of insoluble substances that cannot enter the capillaries;3) help carry toxins and bacteria to cells of the Immune system;4) flush hormones and wastes from the interstitial space;5) assist blood flow through the capillaries.