Q11 Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
The oxygen dissociation curve is a graph which shows the percentage of saturation of oxyhaemoglobin at various partial pressures of oxygen. This curve shows the equilibrium of oxyhaemoglobin and haemoglobin at various partial pressures. In the case of the lungs, the partial pressure of oxygen is high. So, haemoglobin binds to oxygen and forms oxyhaemoglobin.