Therefore, water will move from the tissue and into the blood plasma from a high to a low osmotic potential, in the same way that objects move from a higher to a lower gravitational potential. Now, because inside the blood plasma, the relative concentration of these solute molecules remains the same, that means the zmodic pressure along the entire capillary will also remain the same. It will be equal to about 28 Mercury. So it's the same here as it is the same on the other side, the manual side of our capillary. Now, the question is, how exactly do these two different pressures influence the movement of our blood plasma across the wall of the capillary? Well, to find the net pressure and the net fluid flow, we have to basically add up these two different pressures.