So these organic macromolecules include carbohydrates proteins as well as lipids, also known as fats. So let's begin with carbohydrates hydrates. So carbohydrates are also known as sugars or polysaccharides. And carbohydrates consist entirely of carbon, of oxygen and of hydrogen. Now, carbohydrates basically exist in their polymer form when we actually ingest them in our food products. So what that basically means is carbohydrates exist of these connecting units we call monomers or monosaccharides.