Final answer:
The immune system attacks harmful bacteria, viruses, and foreign materials that might make the body sick. It does not attack other healthy cells.
Step-by-step explanation:
The immune system is responsible for identifying and attacking harmful bacteria, harmful viruses, and foreign materials that might make the body sick. However, it does not attack other healthy cells. Instead, it protects healthy cells from being attacked by pathogens. Therefore, the function of the immune system that does not apply is attacking other healthy cells.
Learn more about Functions of the immune system