Understanding the Lymphatic System The lymphatic system is a network of vessels, nodes, and organs that helps remove waste, toxins, and excess fluid from tissues. It also transports immune cells to fight infections. When lymph flow slows or becomes blocked, swelling and toxin buildup can occur, leading to discomfort and increased risk of illness. Unlike blood circulation, which is powered by the heart, lymph movement depends on: Muscle contractions Deep breathing Body movemen