Well, glycerol molecules contain one to three hydroxyl groups, and that makes them polar molecules. And because our blood plasma consists predominantly of water, that means glycerol will be soluble in the blood plasma, and so it will not actually require any type of protein carrier to transport it within the blood plasma. Now, glycerol molecules ultimately end up in liver cells, and we'll discuss exactly what happens to the glycerol molecules in just a moment. But first, let's actually look at these fatty acids. Now, fatty acids contain this relatively long hydrocarbon chain, the R group, and that makes fatty acids insoluble in water. And so they will not be able to actually dissolve in our blood plasma.