Okay? Now, we can also talk about something called osmotic pressure. Osmotic pressure is the pressure required to stop osmosis. So, for example, suppose we apply some pressure to our cell membrane, and if this pressure equals asthmatic pressure, well, then no osmosis will occur, no movement of water will occur. And this becomes very important when you're talking about hydrostatic pressure and asthmatic pressure in the capillaries of our body. So the last thing I want to talk about is a formula.