sentences: cellular respiration is when a cell converts from oxygen and carbohydrates into carbon dioxide, water, and energy & carbohydrates are made of sugars ->  cellular respiration is when a cell converts from oxygen and sugar into carbon dioxide, water, and energy  cellular respiration is when a cell converts from oxygen and sugar into carbon dioxide, water, and energy & in the cellular respiration / animal respiration process carbon dioxide is a waste product -> carbon dioxide is produced as wasted when sugar is processed by cell respiration