Now, notice between these cells, we have two types of holes. We have a hole known as the intracellular cleft, and we also have a fenestration. And these two holes basically allow the movement of nutrients from one side to another side. So as the blood flows, that hydrostatic pressure pushes on our capillary. That expands the holes and allows the movement of things across our wall of the capillary. So the first way is via the federations.