What is the effect of pCO₂ on oxygen transport?

pCO₂ plays an important role in the transportation of oxygen. At the alveolus, the low pCO₂ and high pO₂ favours the formation of haemoglobin. At the tissues, the high pCO₂ and low pO₂ favours the dissociation of oxygen from oxyhaemoglobin. Hence, the affinity of haemoglobin for oxygen is enhanced by the decrease of pCO₂ in blood. Therefore, oxygen is transported in blood as oxyhaemoglobin and oxygen dissociates from it at the tissues.

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