The main function of vacuoles is the storage of many important molecules like amino acids, sugars, various organic acids, and some proteins. In plants, the vacuoles are very large in size and filled with cell sap that helps to maintain the trugidity and rigidity of the cell.

The central vacuole is a cellular organelle found in plant cells. It is often the largest organelle in the cell. It is surrounded by a membrane and functions to hold materials and wastes. It also functions to maintain the proper pressure within the plant cells to provide structure and support for the growing plant.

The main vacuole function is to store substances, typically either waste or harmful substances, or useful substances the cell will need later on. Vacuoles are most important in plant cells, where they have additional functions, such as maintaining the proper pH and turgor pressure the plant needs to thrive.

-Turgidity: Vacuoles regulate the turgidity by regulating the amount of water present inside the cell. the cell has excessive water: vacuole usually absorbs the water and then diffuses it out of the cell.

The food vacuole, or digestive vacuole, is an organelle found in simple eukaryotes such as protists.

Paramecia ingest all sorts of small particles, but more digestible than indigestible ones. In forming a food-vacuole, the cilia in the pharynx force fluid with particles in suspension against the membrane over the distal opening of the pharynx, producing a sac, the esophageal sac.

The food vacuole or digestive vacuole is a membrane-bound cell organelle (as in an amoeba) associated with a digestive function. They take up the food material by the process of phagocytosis and the ingested food is digested by food vacuole.

Amoeba is a microscopic single-celled organism found in pond water which has a cell membrane, a round, dense nucleus and many bubble like vacuoles. The shape of amoeba is variable. It has tiny finger like projections called pseudopodia or false feet for movement and capture of food.

Contractile vacuole, regulatory organelle, usually spherical, found in freshwater protozoa and lower metazoans, such as sponges and hydras, that collects excess fluid from the protoplasm and periodically empties it into the surrounding medium. It may also excrete nitrogenous wastes.