What is one of the primary functions of the lymphatic system?

The primary function of the lymphatic system is to maintain fluid balance in the body. This system is integral in managing the excess interstitial fluid that builds up in tissues. It does so by collecting lymph — the fluid that leaks from blood vessels into surrounding tissues — and returning it to the bloodstream. By facilitating this drainage process, the lymphatic system helps prevent edema, which is the swelling that occurs when fluid accumulates in the tissues.

Additionally, this system plays a crucial role in the immune response, as lymph contains lymphocytes that help protect the body from pathogens. However, the central role of the lymphatic system is its involvement in fluid homeostasis, ensuring that the body's fluid levels remain balanced and preventing potentially harmful swelling in tissues.