One byproduct of the oxidation of foods is carbon dioxide, which is excreted by the lungs.
(One byproduct of the oxidation of foods; is; carbon dioxide, which is excreted by the lungs) (carbon dioxide; is excreted; by the lungs)
One byproduct of the oxidation of foods carbon dioxide
is is excreted
carbon dioxide, which is excreted by the lungs
by the lungs