Final answer:
Phagocytosis involves the fusion of a food vacuole and a lysosome to digest engulfed particles, which are then expelled from the cell.
Step-by-step explanation:
Phagocytized particles undergo enzymatic digestion following the fusion of the food vacuole with a lysosome. In this process of phagocytosis, often seen in immune cells like phagocytes, the engulfed pathogen or particle is enclosed within an intracellular vesicle known as a phagosome. The phagosome fuses with a lysosome to form a phagolysosome, where hydrolytic enzymes and acids from the lysosome work to kill and digest the pathogen. The remaining soluble debris is then expelled from the cell through exocytosis.