What is the main role of white blood cells in the lymphatic system?

White blood cells, or leukocytes, play a crucial role in the immune response, which is a significant function of the lymphatic system. Their primary purpose is to protect the body against infections and diseases by identifying and eliminating pathogens, such as bacteria and viruses. They do this through various mechanisms, including producing antibodies, engulfing harmful invaders, and coordinating the activities of other immune cells.

In the context of the lymphatic system, white blood cells are transported through lymph vessels and are concentrated in lymphoid organs, such as lymph nodes, where they encounter antigens and initiate an immune response. This protective function is vital in maintaining health and preventing disease, making it the main role of white blood cells in the lymphatic system.