What is the role of the lymphatic system?

The lymphatic system plays a critical role in the immune response, primarily by helping defend the body against infections. It consists of a network of vessels, lymph nodes, and organs that work together to transport lymph, a fluid that contains infection-fighting white blood cells. When pathogens like bacteria or viruses enter the body, lymph carries them to lymph nodes where immune cells can detect and respond to these threats, effectively filtering out harmful substances.

This system also helps in the removal of waste products from tissues, maintaining fluid balance, and absorbing fats from the digestive system, but its central function in sustaining the body's defense mechanisms makes it particularly vital in the context of infection control and immunity.