What is the primary function of white blood cells?

The primary function of white blood cells, also known as leukocytes, is to play a crucial role in the immune system by destroying bacteria and other pathogens that invade the body. They are responsible for identifying and attacking foreign invaders, including viruses, bacteria, and parasites, which helps to protect the body from infections and diseases. White blood cells can take various forms, including neutrophils, lymphocytes, and monocytes, each specializing in different aspects of immune defense.

This role of white blood cells is vital for maintaining overall health, as an effective immune response is necessary to ward off infections. The ability of these cells to recognize and respond to pathogens is fundamental to the body's defense mechanisms. Therefore, the function of destroying bacteria is central to the purpose of white blood cells, emphasizing their importance in the continuum of the immune response.