What is another name for the lymphatic system?

The lymphatic system is often referred to as part of the immunity system because it plays a crucial role in the immune response. This system is responsible for transporting lymph, a fluid containing infection-fighting white blood cells, throughout the body. In addition to defending against pathogens, the lymphatic system also helps in the removal of waste products and excess fluids from tissues. By facilitating the movement of lymphocytes and other immune cells, it enhances the body's ability to respond to infections and maintain overall health.

In contrast, the other systems mentioned have distinct functions. The respiratory system is primarily involved in gas exchange, the circulatory system focuses on blood transport and nutrient delivery, and the endocrine system regulates hormones. Thus, the lymphatic system's specific connection to immune function makes the term "immunity system" appropriate.