The body system that is responsible for fighting pathogens is the lymphatic system. Another important contributor to this mechanism is the immune system, though it is not a system, per se, in terms...
Pathogens do not fight disease. In fact, pathogens are the foreign agents in the body that may cause disease. They are the agents that macrophages and other phagocytes will try to kill in the body.
The immune system fights off the pathogen by Leukocytes also known as white blood cells. When a pathogen enters the body the immune system becomes alert to it and sends out sends out the Phagocytes...