What is the primary function of lipids in living organisms?

The primary function of lipids in living organisms includes insulation and energy storage. Lipids, which comprise fats and oils, serve as a long-term energy reserve for organisms, as they contain more than twice the energy per gram compared to carbohydrates and proteins. This energy-rich nature makes lipids an efficient form of energy storage.

Additionally, lipids play a crucial role in insulation. They form a protective layer under the skin of many animals, helping to maintain body temperature by reducing heat loss. This is particularly important for organisms in cold environments.

By combining these roles, lipids contribute significantly to the overall energy management and thermoregulation within living systems, highlighting their essential function in biological processes.