The movement of water by osmosis is always from a region of higher water potential (or lower solute concentration) to a region of lower water potential (or higher solute concentration). This fundamental principle underlies countless biological processes, from the uptake of nutrients by plant roots to the regulation of cell volume in animal tissues. Understanding osmosis not only clarifies how living organisms maintain internal balance but also provides insight into practical applications such as food preservation, medical therapies, and industrial filtration.
What Is Osmosis?
Osmosis is the passive movement of water molecules across a selectively permeable membrane. Unlike active transport, which requires energy input (usually ATP), osmosis relies solely on the kinetic energy of water molecules and the differences in solute concentration on either side of the membrane. The membrane allows water to pass freely while blocking most solutes, creating a driving
