How is Energy Recharged?

Have you ever heard a friend say, "I need to recharge my batteries?" Unless your friend is a robot, the saying is not literal. It is an expression people use when they are tired or low on energy.Humans don't have battery packs to supply our energy like a robot does, so where do we get it?

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Our energy comes from the food we eat.Molecules in our food, such as fat and carbohydrates, store energy that is released when they are broken down and digested.

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Just like a robot needs a specific type of battery, the functions of our cells require a specific type of energy. Your cells use the energy from food to "charge up" an important molecule, which in turn powers most of the movement and work within the cell.

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