And we realized that these aquaporeans are channels that selectively funnel allow the movement of these water molecules across the membrane. And the rates at which the water molecules moves through these aquaporeans are much higher than the rates at which the water molecules actually diffuse through that phospholipid bilayer membrane. And we'll see why that's important in just a moment. So basically, there are certain instances inside our body and inside the bodies of other organisms when these cells must be able to actually quickly and effectively move the water molecule from one side to the other side. And that's when these aquaphones are actually used. Now, it's important to note that aquaporns are not actually ion channels.