Fill in the Blanks Lymph FluidOnline version Complete this activity to help you retain information about Lymph Fluid by Leah Lloyd 1 arterial interstitial pressure blood plasma volume lymph blood lymphatic interstitial vessels lymph lymphoid venule edema The lymphatic system consists of a fluid ( ) , vessels that transport lymph , and the organs that contains tissue . Lymph is a fluid similar in composition to plasma . It is derived from blood as fluid pass through capillary walls at the end . About 90% of the fluid reenters the capillary at the end . The remaining 10% is added to the fluid . As the interstitial fluid begins to accumulate , it is picked up and removed by tiny which eventually return it to the blood . As soon as the fluid enters the lymph capillaries , it is called . Returning the fluid to the prevents and helps to maintain normal blood . plasma protein concentration , and blood .