Question

structure that combines with oxygen in the lungs

Answer 1

Haemoglobin is the pigment which combines with oxygen in the lungs and forms oxyhaemoglobin
The blood is transported throughout the body and when it reaches the cells, the oxyhemoglobin then breaks down into haemoglobin and oxygen.

This oxygen is used up by the cells for the oxidation of food and the haemoglobin once again combines with oxygen and the cycle continues.

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Answer 2

Explanation:

oxyhaemoglobin bro 100%