The respiratory system works with the digestive and circulatory systems to make cellular respiration possible. During cellular respiration, your cells use oxygen and glucose to release energy. Carbon dioxide is a waste product of the process. Carbon dioxide must be removed from cells.
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Chemical energy is energy stored in the bonds of atoms and molecules. ...
Mechanical energy is energy stored in objects by tension. ...
Nuclear energy is energy stored in the nucleus of an atom—the energy that holds the nucleus together.
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