Which fact suggests that most oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?

  • A
    Oxygen carrying capacity of whole blood is much higher than that of plasma and oxygen content of blood leaving the lungs is greater than that of blood entering the lungs.
  • B
    Haemoglobin can combine with oxygen.
  • C
    Oxyhaemoglobin can dissociate into haemoglobin and oxygen.
  • D
    Increase in carbon dioxide concentration decreases the oxygen affinity of haemoglobin.

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