And those fats are eventually absorbed by the cells of the small intestine. Now, those absorb fats eventually end up in our blood system and the liver cells are capable of absorbing those fatty acids and they store the fatty acids in the form of triglycerides. Now, when the cells of our body, when our body needs energy, what the liver cells can also do is they can also actually break down the fatty acids and use the fatty acids to form ATP molecules, energy molecules, in a reaction known as beta oxidation. And finally, what the liver cells can also do is if we eat too much sugar or too much protein, what the liver cells do is they transform the sugars or the protein into fat. Now, let's move on to our protein, the final type of macromolecule that we ingest into our body and that our body actually needs to survive. So we actually ingest ten essential amino acids that our body cannot actually manufacture, but the other ten none essential amino acids are produced by the liver cell.