The lymph nods are the unsung heroes of the body. The lymphatic system is responsible for removing toxins, waste, and unwanted materials from the body through a clear fluid called lymph, which contains white blood cells. The lymph is typically found in the blood as plasma. The lymphatic system does have vasculature like the circulatory system, however, it is not as easily visualized. Lymph is collected from tissues in the interstitial space (area between) cells to be cleaned before it is returned to the circulatory system up by the heart.