Osmosis is the movement of water molecules across a semipermeable membrane from an area of high water concentration to an area of low water concentration until the concentration is equal on both sides of the membrane. This process occurs spontaneously and does not require energy input from the cell. It is an important process in many biological systems, including the absorption of nutrients by roots in plants and the regulation of water balance in animal cells.
Osmosis is a process by which solvent molecules pass through a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. It is a type of diffusion, but specifically refers to the movement of water molecules. The semi-permeable membrane allows the passage of water molecules but not solute molecules.
