And those are the polar regions. They can interact with each other as well as with the water molecules found on the aqueous environment. So another major difference between this bimolecular sheets and the my cell is inside the MiCell, because we don't have any polar region, there's really no aqueous environment on the inside. But in this particular case, this entire lipid bilayer extends to form this globular, this circular structure. And notice we have an aqueous environment on the inside and the outside of that structure because we have these two leaflets and they both contain these polar regions that contract with the water molecules on either side of that membrane. So we have an aqueous environment on either side of this structure, but an aqueous environment only exists on the outside of this structure.