What is the primary function of neutrophils?

Neutrophils are a type of white blood cell that play a crucial role in the immune system, primarily tasked with defending the body against infections. They are among the first responders to sites of inflammation or infection, where they work to identify, engulf, and destroy pathogens such as bacteria and fungi through a process known as phagocytosis. In addition to their direct action against pathogens, neutrophils also release various substances that can recruit additional immune cells and further enhance the inflammatory response, making their role vital in protecting the body from infectious diseases.

The other choices do not accurately represent the primary function of neutrophils. Inducing vomiting is not a role of these immune cells but is instead a function related to the gastrointestinal system, often involving other types of digestive or neurological responses. Providing structural support is associated with cells such as fibroblasts or muscle cells rather than neutrophils, which are specifically involved in immune defense. Carrying oxygen in the blood is the primary responsibility of red blood cells, not neutrophils, which have an entirely different function in the circulatory and immune systems.