And so, because we have a polar and a non polar region, fatty acids are technically amphatic. But because the hydrocarbon section makes up a much larger portion of the fatty acid, fatty acids are non polar molecules, hydrophobic. They will not dissolve in aqueous environments. Now, to demonstrate what we mean by fatty acid, let's take a look at the most common type of fatty acid in humans and other animals, known as palmitic acid. Now, let's take a look at this molecule. So this entire section is the hydrocarbon chain, and this functional group is that carboxylic acid.