There are two types of osmosis – endosmosis and exosmosis. 

Endosmosis 

Endosmosis occurs when a cell or substance is placed in a hypotonic solution. In this case, the solute concentration inside the cell or substance is higher than the surrounding environment, causing water molecules to flow into the cell to balance the concentration. The movement of water from the surrounding environment into the cell is known as endosmosis. When endosmosis occurs, the cell becomes turgid or undergoes deplasmolysis. 

Exosmosis 

Exosmosis occurs when a cell or substance is placed in a hypertonic solution. In this case, the solute concentration inside the cell or substance is lower than that of the surrounding environment, causing the water to flow outward from the cell to balance the concentrations. The movement of water from the cell to the surrounding environment is known as exosmosis. When exosmosis occurs, the cell becomes flaccid or undergoes plasmolysis.