Which is the largest organ of the lymphatic system?

The spleen is the largest organ associated with the lymphatic system. It sits under the left rib cage and plays a major role in filtering blood rather than lymph alone. It removes old or damaged red blood cells, stores platelets, and helps the immune system respond to infections. The spleen also contains white blood cells that recognize pathogens. Although it is not essential for survival, it is important for long-term immune health.