Vacuoles are membranous organelles of a eukaryotic cell. There are multiple types of vacuoles.
Food vacuoles are pieces of the plasma membrane that pinch off and detach from the rest of the plasma membrane around an incoming food particle. They attach to a lysosome in the cytoplasm and the lysosome?s enzymes digest the food within.
Contractile vacuoles pump out water from the cell by taking in water and then contracting, squeezing out the excess. This process is necessary for the cell to regulate its water content.