Organic chemicals are compounds primarily made of carbon atoms, often combined with hydrogen, oxygen, nitrogen, and other elements. They form the basis of all living organisms and are essential in various biological processes. Common examples include carbohydrates, proteins, and lipids, which play crucial roles in metabolism and cellular structure. These chemicals can be found in everyday products, such as fuels, plastics, and medications. Organic chemistry, the study of these compounds, helps scientists understand their properties and reactions, leading to advancements in fields like pharmaceuticals and agriculture.