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

Question: Does human blood change colour when it is exposed to oxyegen???????????
- Keywords:
  blood,
  colour,
  human,
  oxygen
Asked by 583fddk28 to Yvonne on 9 Nov 2017. This question was also asked by Eoin C.
- 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!

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