Neutrophil engulfing thrush fungus. Coloured scanning electron micrograph (SEM) of a neutrophil white blood cell engulfing and destroying a hypha (blue) from a thrush (Candida albicans) fungus. This process is called phagocytosis. Neutrophils are the most abundant white blood cell and are part of the bodys immune system. Hyphae are the long, branching filamentous cells of a fungus.