Body tissues obtain oxygen from haemoglobin because of its dissociation  caused by
1 only low conc of o2
2 both low conc of o2 and high conc of co2

everywhere 1st option is correct but high conc of co2 is also a factor in dissociation of oxyhaemoglobin.
then why isnt 2 the answer?

high CO2 is not a defined factor,so option 1 is preferred.It is my opinion u may ask any experts and verify it.
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