What is the primary function of the lymphatic system?

The primary function of the lymphatic system is to collect and transport tissue fluids back to the blood system. This process is essential for maintaining fluid balance within the body. The lymphatic system collects excess interstitial fluid that accumulates in the tissues and returns it to the bloodstream, preventing edema and ensuring that tissues do not swell excessively.

Additionally, the lymphatic system plays a crucial role in the immune response by transporting lymph, which contains white blood cells that help defend the body against infection and disease. This system also helps absorb and transport fats and fat-soluble vitamins from the digestive system, contributing to overall nutrition and health.

While the production of red blood cells is primarily a function of the bone marrow, filtering impurities from blood is mainly performed by the kidneys and liver. Regulating body temperature is a broader bodily function that involves various systems, including the skin and circulatory system, rather than being a primary function of the lymphatic system.