What is the primary mechanism of fluid movement in osmosis?

The primary mechanism of fluid movement in osmosis involves the movement of water from an area of low solute concentration to an area of high solute concentration. This process occurs because water naturally seeks to achieve equilibrium between solute concentrations on either side of a semi-permeable membrane. When there is a difference in solute concentration, water will move toward the area where the solute concentration is higher, effectively diluting it and balancing the concentrations across the membrane.

This concept is fundamental in understanding bodily functions, particularly in kidney dialysis, where osmosis helps manage fluid balance. It illustrates how fluids and solutes interact within the body, influencing treatments for patients undergoing hemodialysis.