What is osmosis?

Osmosis refers specifically to the diffusion of water molecules through a semi-permeable membrane. This process occurs naturally as water moves from an area of higher water concentration to an area of lower water concentration, aiming to achieve equilibrium on both sides of the membrane. Semi-permeable membranes allow certain molecules, like water, to pass through while blocking others, which is crucial for maintaining cell homeostasis and regulating internal conditions. This ability of cells to control the flow of water in and out is vital for their function and survival, impacting processes such as nutrient absorption and waste removal.