What is the role of the lymphatic system?

The role of the lymphatic system primarily involves carrying tissue fluid, known as lymph, and playing a crucial part in the body's immune response to fight infections. The lymphatic system collects excess interstitial fluid (fluid that surrounds tissues) and returns it to the bloodstream, maintaining fluid balance in the body. It also transports white blood cells, particularly lymphocytes, which are vital for the immune system. These cells help in identifying and destroying pathogens like bacteria and viruses, thereby assisting in defending the body against infections.

Moreover, the lymphatic system includes lymph nodes, which filter lymph fluid and serve as sites for the activation of immune responses. This complex system ensures that the body can respond efficiently to various pathogens and maintain overall health.