1. Carbohydrates: These provide energy for the body's functions and are composed of carbon, hydrogen, and oxygen. Examples include sugars, starches, and fiber.
2. Lipids (fats): These are essential for energy storage, insulation, and hormone production. They are composed of carbon, hydrogen, and oxygen, but also include other elements like phosphorus. Examples include triglycerides, phospholipids, and steroids.
3. Proteins: These are essential for building and repairing tissues, transporting substances, and regulating bodily processes. They are composed of carbon, hydrogen, oxygen, and nitrogen. They are made up of amino acids.
While these three are the primary building blocks, it's important to note that the body also contains other organic compounds in smaller quantities, such as nucleic acids (DNA and RNA), which are essential for genetic information and protein synthesis.
