Oxyhaemoglobin is a form of haemoglobin that has combined with oxygen. Haemoglobin is a protein found in red blood cells that transports oxygen from the lungs to the rest of the body. When oxygen enters the blood in the lungs, it binds to haemoglobin to form oxyhaemoglobin. This allows oxygen to be carried in the bloodstream and delivered to cells for respiration. Once the oxygen is released, the haemoglobin returns to the lungs to collect more oxygen, continuing the cycle.
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