Instead of having haemoglobin to carry iron in a red blood cell, could you replace it with something else to carry

Question: Instead of having haemoglobin to carry iron in a red blood cell, could you replace it with something else to carry antibiotics in the blood?
- Keywords:
  medicine
Asked by jessiburt to Kat, Andrew, Katie, Sadaf on 20 Jun 2013.
- Andrew Swale answered on 20 Jun 2013:
  
  Haemoglobin is responsible for carrying oxygen around our body therefore we would not be able to replace it
  
  However, research into synthetic blood substitutes is attempting to identify other alternatives which may allow oxygen to be transported around the body

nick69lol commented on 20 Jun 2013:

very good ya

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fredrick22 commented on 20 Jun 2013:

Hello Andrew, thank you for chatting with our class this afternoon; we were really excited 😀 .

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Question: Instead of having haemoglobin to carry iron in a red blood cell, could you replace it with something else to carry antibiotics in the blood?