Final answer:
Triglycerides are primarily responsible for providing energy to cells and are a key form of stored energy in the body, playing several roles including energy storage, vitamin transport, and bodily protection.
Step-by-step explanation:
The primary role of triglycerides is to provide the cells with energy. They act as the main form of stored energy in animals, including humans, and play a crucial role in metabolism. When you consume food, any extra calories that your body does not need immediately are converted into triglycerides and stored in fat cells. Upon need, these triglycerides are released back into the bloodstream to be used as energy. This process makes them important for sustaining life while resting or performing activities like gardening or hiking. Moreover, triglycerides contribute to the absorption and transportation of fat-soluble vitamins and play a protective role in cushioning organs and insulating the body.