And the rates at which that takes place the water travels through these aquaporeans are much higher than the rates at which the water actually moves through that membrane. Another example are red blood cells. So red blood cells actually contain a high concentration of aquaporeans in their membrane. And that's because red blood cells, as they travel through the capillaries must be able to actually control and regulate the volume inside the red blood cell and the pressure inside that red blood cell. So the hydrostatic and the osmotic pressure. Another location where we find aquaporeans abundantly are the cells of the kidneys.