The tails will point inward, the heads will point outward. So we have our outer membrane. So if we imagine this to be the cell membrane, the cell membrane basically spans around the entire cell. Now, we have inside the cell is the cytosol. Outside the cell is the extracellular liquid, the fluid, which is also polar. So these heads of the phospholipids are polar, so they're hydrophilic, they will point outward.