What does the lymphatic system primarily do?

The lymphatic system primarily functions to clear wastes and toxins from the body. It is a crucial part of the immune system, aiding in the removal of toxins and waste products that accumulate in bodily tissues. The lymphatic vessels transport lymph, a fluid that contains white blood cells, particularly lymphocytes, which are important for immune responses. By filtering lymph through lymph nodes, the system helps to eliminate harmful substances, including pathogens and cellular debris, thereby supporting overall health.

This role is vital in maintaining fluid balance as well, as the lymphatic system returns excess interstitial fluid back to the bloodstream. While the other answers address important physiological processes, they do not specifically capture the main function of the lymphatic system, which is centered around waste clearance and detoxification.