What role does the immune system play in the body?

The immune system plays a crucial role in the body by protecting against disease and infection. It is a complex network of cells, tissues, and organs that work collaboratively to defend the body against harmful pathogens like bacteria, viruses, fungi, and parasites. When the immune system identifies these foreign invaders, it initiates a response that can include the production of antibodies, activation of immune cells, and release of various chemicals that help eliminate the threats.

This system not only guards against immediate infections but also contributes to the development of immunity, meaning it can remember previous invaders and respond more effectively upon subsequent exposures. The primary function of the immune system is to maintain the body's health and ensure survival by fending off illnesses, making its protective role essential in the overall functioning of the body.