What is the primary function of the lymphatic system?

The primary function of the lymphatic system is to transport lymph and support immune function. The lymphatic system consists of a network of lymphatic vessels, lymph nodes, and other lymphoid tissues, which collectively play a crucial role in maintaining fluid balance in the body by returning excess interstitial fluid to the bloodstream. Additionally, this system is pivotal in the immune response, as it facilitates the transport of lymph, a fluid that contains immune cells, particularly lymphocytes, which are vital for identifying and battling pathogens such as bacteria and viruses.

The lymphatic system also collects and filters out foreign particles and pathogens through lymph nodes before returning lymph to the circulatory system, enhancing the body's defense mechanisms. This dual role in fluid regulation and immune function is what makes the lymphatic system essential for overall health and homeostasis.