respiration is A reaction That Breaks Down Glucose To create energy saccharides that are created by plants through photosynthesis are stored in the form of starch, which we animals eat. organisms like us break down starch into glucose, which is used to make ATP, with the assistance of the oxygen that we breathe in. M mM , yummy Glucose energy That's internal respiration! here, take a look at this. it's the general formula for respiration.