Phagocytes are a type of white blood cell that play a crucial role in the immune system. Their primary function is to identify, engulf, and destroy harmful pathogens, such as bacteria and viruses. This process is known as phagocytosis, where the phagocyte surrounds the invader and breaks it down using enzymes. There are several types of phagocytes, including neutrophils and macrophages. Neutrophils are usually the first responders to infection, while macrophages can consume larger particles and help clean up dead cells. Together, these cells help protect the body from infections and maintain overall health.