So, if we examine the following diagram, we see that inside our capillary, the blood plasma actually contains a higher concentration of solute molecules. It contains more proteins, it contains more ions, and so forth. And as a result, it has a greater concentration of solute. Now, recall that water always naturally moves from a lower solute concentration to a higher solute concentration. Water always moves from a high osmotic potential to a low asthmatic potential. And because a greater solid concentration means a lower osmotic potential, water will always move from the tissue side to the blood plasma side of our capillary.