What is the primary function of neutrophils in the immune system?

Neutrophils play a crucial role in the immune system, primarily serving as the first line of defense against infections. Their main function is to engulf and destroy bacteria and dead cells, a process known as phagocytosis. When an infection occurs, neutrophils are rapidly recruited to the site of inflammation, where they recognize pathogens through various receptors. Once they encounter bacteria, they ingest them and utilize enzymes stored within specialized granules to break them down, effectively neutralizing potential threats and assisting in tissue repair.

This action is vital in the early stages of immune response, contributing significantly to inflammation and providing a rapid response to acute infections. Neutrophils are numerous in the bloodstream and can migrate quickly to tissues in need, underscoring their importance in innate immunity. The other options relate to different types of immune cells and functions, but the primary role of neutrophils is distinctly focused on phagocytosis of pathogens and cellular debris.