One of the functions of the respiratory system is to rid the body of CO2. Where does the CO2 come from?
A)CO2 is a breakdown product of the carbohydrates or lipids oxidized in cellular respiration. B)CO2 is a breakdown product of the carbohydrates or lipids reduced in cellular respiration. C)CO2 is produced when inhaled oxygen combines with carbon atoms from carbohydrates or lipids. D)CO2 is produced when the oxygen atoms of water combine with carbon atoms.