What is the process of osmosis primarily concerned with?

Osmosis is specifically the movement of water across a selectively permeable membrane. It occurs when water molecules move from an area of higher concentration (more water, or a lower solute concentration) to an area of lower concentration (less water, or a higher solute concentration). This process is crucial for maintaining cellular homeostasis and ensuring that cells have the right amount of water to function properly. By balancing the concentrations of solutes and solvents (in this case, water), osmosis helps to regulate various physiological processes in living organisms. Understanding osmosis is essential for comprehending how cells interact with their environment, particularly in relation to hydration and nutrient transport.