In the center, we have a porous, flexible membrane on which we can add human cells from, say, our lungs, and then underneath, they had capillary cells, the cells in our blood vessels.
U sredini imamo poroznu, savitljivu membranu na koju postavimo humane stanice iz recimo, naših pluća, pa potom ispod imaju kapilarne stanice, stanice naših krvnih žila.