why does blood change color when exposed to oxygen



  1. 0 Votes

    The protein hemoglobin stores iron in the blood.  When it becomes oxidized it produces a red color.  This is much the same as the oxidation of iron rust.

  2. 0 Votes

    Your red blood cells contain iron-rich protein molecules called hemoglobin.  When hemoglobin picks up oxygen, either from your lungs or from the air when you get a cut, your blood turns a bright red color.  As bialowieza stated earlier, this process is remeniscient of the rusting process that iron goes through.

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