What is a primary function of neutrophils?

Neutrophils play a crucial role in the innate immune response, primarily functioning to provide nonspecific destruction of foreign organisms. They are the most abundant type of white blood cells and are often the first responders to sites of infection or inflammation. When they encounter pathogens such as bacteria or fungi, neutrophils can engulf and destroy these organisms through a process known as phagocytosis.

In addition to phagocytosis, neutrophils release various enzymes and reactive oxygen species that help to kill and digest invaders. Their ability to rapidly respond to infection and effectively neutralize a variety of pathogens highlights their critical role in the body's initial defense mechanisms. This nonspecific activity is a key aspect of the immune system, distinct from the adaptive immune responses mediated by lymphocytes, which recognize specific antigens. By understanding this primary function, the distinctive roles of different cell types in the immune response can be appreciated more comprehensively.