What is the primary function of the lymphatic system?

The primary function of the lymphatic system is to filter debris and bacteria from the blood. This system plays a critical role in maintaining the body's immune system and fluid balance. It consists of a network of lymph nodes, vessels, and organs that work together to collect and transport lymph—a fluid that contains infection-fighting white blood cells—as well as other substances from tissues throughout the body back to the bloodstream.

Lymph nodes act as filters, trapping pathogens and foreign substances, which helps to prevent infections. When the lymphatic system filters out these materials, it not only helps protect the body from disease but also contributes to the removal of waste products. Hence, this function is vital for an effective immune response and overall health.