So the hydrostatic pressure that is exerted on the walls of the capillary on the arterial end is about 41.3 Mercury. But on the venue end, it's about 21.3 mmhg. And we'll see what that means in just a moment. Now let's move on to the osmotic pressure. So, osmotic pressure, also known as oncotic pressure, and we'll see why in just a moment, is the pressure that exists between the two sides of a semi permeable membrane as a result of a difference in solute concentration between the two sides of that semipermeable membrane. In this case, our semipermeable membrane is the wall of the capillary.