Here's why:
* Cellular respiration produces CO2 (carbon dioxide), not CO. CO2 is a waste product of cellular respiration, specifically from the Krebs cycle and oxidative phosphorylation.
* CO is a toxic gas. It's dangerous to our health and isn't a normal product of the metabolic processes in our cells.
Where does CO come from?
CO is primarily generated by incomplete combustion of fuels (like fossil fuels or wood) and certain industrial processes. It can also be produced in small amounts from the breakdown of heme in the body, but this is not related to cellular respiration.
To summarize:
* Cellular respiration produces CO2.
* CO is a toxic gas produced by other sources, not cellular respiration.
