The tail will basically lie inside the membrane and will be parallel with respect to the nonpolar tails of those phospholipids. Now, to see what we mean by all that, let's take a look at the following diagram. A two dimensional image of our cell membrane, found typically, let's say, in eukaryotic cells, such as our own cells of the body. Now, all these blue molecules, so these blue molecules with these two purple regions, these are the phospholipids. So we have the phosphate group, showed in blue. And these purple regions are basically those fatty acids.