The lymphatic system is a network of vessels, nodes, and organs that plays a crucial role in the body's immune function and fluid balance. It helps transport lymph, a clear fluid containing white blood cells, throughout the body. This system collects excess fluid from tissues and returns it to the bloodstream, preventing swelling and maintaining proper fluid levels. Additionally, the lymphatic system filters harmful substances, such as bacteria and viruses, through lymph nodes. These nodes act as checkpoints, where immune cells can detect and respond to infections. Overall, the lymphatic system is essential for protecting the body and supporting overall health.