In article <Pine.SOL.3.94.970210105935.1242B-100000 at mol> Ralph Leonhardt <leo at neuroinformatik.ruhr-uni-bochum.de> writes:
>But as far as I know the critical parameter is CO2
>concentration, since it binds tighter to the hemoglobin in the blood than
>O2 and with higher external CO2 it does not dissociate as readily as it
>does normally. For further information se any physiology textbook.
You're confusing the behavior of CO2 with the behavior of CO; CO2 doesn't
displace oxygen from hemoglobin.