"Sugars and starches are compounds made of only three elements -- carbon, hydrogen, and oxygen. When sugars and starches are broken down to these elements, there are two atoms of hydrogen and one of oxygen for every atom of carbon. Two atoms of hydrogen and one atom of oxygen are the same as a molecule of water. For this reason, sugars and starches were called carbohydrates
which means watered carbon
.""In the eighteenth century, scientists became interested in a kind of substance found in all living things that acted differently from all other substances. If a fluid like blood or egg white was heated, it did not become a boiling liquid like water or oil. Instead, it became a solid. And, if this was not strange enough, once changed to a solid, it could never again become a liquid. Nothing could be done to return blood or egg white to its original liquid state. It did not take scientists long to realize that this strange material that changed permanently when heated was the very basis of all life. For this reason, they named it protein meaning, of first importance."
~ Vicki Cobb in Science Experiments You Can Eat