• Question: Why is blood red?

    Asked by ohlookaduck to Kat, Andrew, Katie, Sadaf on 21 Jun 2013. This question was also asked by andreea.
    • Photo: Andrew Swale

      Andrew Swale answered on 21 Jun 2013:

      This is due to the iron (haemoglobin) present in our blood

      This is why in other animals who have haemocyanin instead of haemoglobin have blue blood, due to the copper instead of the iron

    • Photo: anon

      anon answered on 26 Jun 2013:

      The haem molecule in blood is red and made of iton giving blood its colour

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