A phagocyte is a type of immune cell in the human body that specializes in engulfing and destroying harmful microorganisms, cellular debris, and foreign particles. They play a crucial role in the innate immune response by recognizing and ingesting pathogens through a process called phagocytosis. Phagocytes include cells such as macrophages and neutrophils, and they are essential for defending the body against infections and maintaining tissue homeostasis.