The fourth Caligra property is called astronomic pressure. Asthmatic pressure is a tendency of water or some other solvent to flow into an area with a higher solute concentration. Now, to demonstrate as much like pressure, let's build a system. In this system, we have a cell that's embellished in a semipermeable membrane. Now, this membrane allows the flow of water, but it does not allow any site molecules to pass through. Now, on the outside, we have many more site molecules than on the inside.