What organ system works closely with the immune system to protect the body?

The lymphatic system plays a crucial role in protecting the body alongside the immune system. This system is comprised of a network of lymph vessels, lymph nodes, and organs such as the spleen and thymus. It is responsible for transporting lymph, a fluid that contains white blood cells, which are essential for fighting infections and diseases.

The lymphatic system acts as a drainage system for body tissues, collecting excess fluid and returning it to the bloodstream while filtering out pathogens and foreign materials. Lymph nodes, strategically located throughout the body, serve as filters where immune responses can be activated. When the body encounters an infection, lymph nodes may swell as they produce more white blood cells to combat the invaders. This coordinated work ensures that the body can detect, respond to, and remember infections, which is key to providing long-term immunity. Thus, the close relationship between the lymphatic system and the immune system is fundamental for maintaining health and protecting the body against various threats.