What is another name for the lymphatic system?

The lymphatic system is often referred to as the immune system due to its critical role in the body's immune responses. This system comprises a network of lymphatic vessels, lymph nodes, and organs that work together to defend the body against pathogens and disease. It plays a vital role in the production and transport of lymph, which contains lymphocytes, a type of white blood cell that is essential for immune function.

While the circulatory system is responsible for the transport of blood and nutrients throughout the body, and the nervous system is involved in communication and control of bodily functions, the lymphatic system specifically focuses on immunity and fluid balance. The muscular system pertains to body movement and structure rather than immune defense. Therefore, calling the lymphatic system the immune system highlights its primary function in protecting the body from infections and foreign substances.