Fats and fatty acids are the long range source of energy. The fat in the diet provides the full gas tankreserve for endurance. Part of the fatty acids are converted to easily digested sugar forms that arestored in the liver. The fatty acids that are not held in reserve in the liver provide for part of thepresent energy needs of the body or they are deposited in and about the muscular system. Thecomplete absence of fat in the diet means slow starvation even if the other nutrients are ample.3. There is another source of energy but a smaller portion of the amount eaten goes into the readyreserve.