• Question: Does human blood change colour when it is exposed to oxyegen???????????

    Asked by 583fddk28 to Yvonne on 9 Nov 2017. This question was also asked by Eoin C.
    • Photo: Yvonne Lenighan

      Yvonne Lenighan answered on 9 Nov 2017:


      Hi,

      Great question!

      So I don’t see a massive colour change when we take blood… However, you are right regarding the difference in colour.. The blood is sometimes a slightly lighter colour as we collect blood from veins which are deoxygenated which means that the blood is a dark red colour when we collect it!

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