Explain how carbohydrates, proteins and lipids are important to body functions.

Monosaccharides and disaccharides are water soluble and easier to transport to and from storage sites than lipids. Animals tend to use carbohydrates primarily for short-term energy storage, while lipids are used more for long-term energy storage.
Carbohydrates are your body's main source of energy: They help fuel your brain, kidneys, heart muscles, and central nervous system. For instance, fiber is a carbohydrate that aids in digestion, helps you feel full, and keeps blood cholesterol levels in check.