The lymphatic and immune systems are very closely intertwined. Both need each other to function. The lymphatic system filters and removes debris from the body. The immune system is a major part of the body's defense system and produces cells and certain proteins called antibodies to fight infections. To learn more about these important systems see The Lymphatic System and The Immune System .
Blood is composed of several different types of cells and proteins.
Red blood cells give blood its color and are responsible for the transportation of both oxygen and carbon dioxide to and from the body's tissues . Another constituent of blood is the infection-fighting white blood cells . A third cell type, the platelets, circulate in the blood. Platelets are responsible for clotting. White blood cells, red blood cells and platelets are all formed within the bone marrow.