Which type of white blood cell is primarily involved in the immune response?

Neutrophils are the most abundant type of white blood cells and are a crucial component of the innate immune system. They respond quickly to sites of infection or inflammation, where they act as the first line of defense against pathogens. Neutrophils are particularly effective at engulfing and destroying bacteria and fungi through a process called phagocytosis. They also release enzymes and antimicrobial substances that help to eliminate these invaders.

While other types of white blood cells also play important roles in the immune response, neutrophils are specifically recognized for their rapid and effective response to acute infections. This makes them a key player in the overall immune defense mechanism of the body.