Macromolecules are essential nutrients that our body needs in order to function. We cannot manufacture theses nutrients, so we must obtain them from our environment. Macromolecules are an essential source in our bodies and they help keep us alive. We call theses building blocks of life carbohydrates, lipids, and proteins. Carbohydrates are made up of sugars, such as glucose, and fructose. Carbohydrates are good at storing energy, one of the examples of a carbohydrate is bread. Next is lipids, they are smaller and simpler then carbohydrates. Lipids group together because they are not able to dissolve in water, lipids have hydrophilic tails and hydrophobic heads that cause them to clump together when submerged in water. Lipids are made up of