English: This diagram shows how lysosomes digest materials taken into the cell and recycle intracellular materials. Step one shows material entering a food vacuole through the plasma membrane. In step two a lysosomes within an active hydrolytic enzyme comes into picture as the food vacuole moves away from the plasma membrane. Step three consists of the lysosome fusing with the food vacuole and hydrolytic enzymes entering the food vacuole. In the final step, step four, hydrolytic enzymes digest the food particles.