They use water to lubricate, to cleanse and aid in absorption.
The lymph not only acts as an immune system, but also helps in circulatory retrieval of small amounts of escaped fluid from capillary diffusion due to pressure alterations. if these lymph vessels become occluded, flow of fluid will become backed up and will result in gross edema(swelling) of the affected area. With the continual inability to retrieve fluid, less and less fluid returns to the heart resulting in a sort of hypovolemic state. however this is highly unlikely and is usually caught before it is allowed to become this severe.
Medial collateral ligament (MCL) and lateral collateral ligament (LCL)
