Neutrophils are a type of white blood cell that play a crucial role in the immune system. They are the body's first line of defense against infections, particularly bacterial infections. Neutrophils are produced in the bone marrow and are characterized by their ability to quickly respond to sites of infection or inflammation. These cells work by engulfing and destroying pathogens through a process called phagocytosis. Neutrophils also release enzymes and chemicals that help to break down harmful microorganisms. Their rapid response and ability to communicate with other immune cells make them essential for maintaining health and fighting off diseases.