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Breathe through the nose for better oxygenation How we breathe influences Oxygen (O²) transfer from our blood to our muscles and organs. Haemoglobin is the protein molecule in red blood cells (erythrocytes) that carries O² from the lungs to the body’s tissues and organs and returns Carbon Dioxide (CO²) from the tissues back to the lungs   The air we breathe contains 21% O². The bloods O² saturation (SpO²) is a p