We inhale O2 and exhale CO2, so does that mean we just add carbon and exhale the same oxygen we just inhaled? Why cant we just exhale carbon?
In: Biology
Breathing in O2 is exactly like intake of an engine, it goes inside where the fuel is and its needed to burn the fuel to produce energy. Then that engine needs to exhaust the byproduct of this “burning” i.e. CO2.
Both our intake and exhaust are through the same hole though.
Also it makes no sense for engine to just exhaust out specifically carbon atoms from its fuel. CO2 is the byproduct of “burning” of the any carbon(organic) based fuel, “burning” for energy is the main point.
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