What type of cell is a phagocyte?

A phagocyte is primarily understood as a type of white blood cell that plays a crucial role in the immune system by engulfing and destroying microorganisms such as bacteria and viruses. This process, known as phagocytosis, allows phagocytes to help protect the body from infections and clear away dead or dying cells. The primary phagocytes in the body include neutrophils and macrophages, which are essential for the body's innate immune response.

In contrast, other options describe different types of cells that do not perform the same function. Red blood cells are responsible for oxygen transport throughout the body. Cells in the brain serve various functions, including some related to the immune response, but they are not classified as phagocytes. Hormone-producing cells, such as endocrine cells, have an entirely different role related to secretion and regulation of bodily functions. Thus, the definition and role of phagocytes align perfectly with being white blood cells tasked with the destruction of microorganisms.