What is the primary function of the immune system?

The primary function of the immune system is to scan for and destroy pathogens. The immune system is a complex network of cells, tissues, and organs that work together to identify and eliminate harmful invaders, such as bacteria, viruses, fungi, and parasites. This protective mechanism is crucial for maintaining health and preventing infections.

The immune system employs various strategies, including the use of white blood cells that can recognize foreign substances through specific markers called antigens. Once a pathogen is detected, immune cells work to neutralize or destroy it through processes like phagocytosis, where cells engulf and digest the pathogens, and the production of antibodies that specifically target and mark pathogens for destruction.

Understanding this function highlights the importance of a robust immune system in overall health, as it enables the body to respond effectively to infections and disease threats.