Oxygen is transported to body cells by binding to hemoglobin in red blood cells, which are carried through the bloodstream to tissues where oxygen is released for cellular respiration.
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Oxygen is transported to all body cells by binding to hemoglobin in red blood cells. When blood flows through the lungs, hemoglobin binds to oxygen. The oxygen-rich blood is then circulated by the heart through arteries to tissues and cells, where oxygen is released for cellular functions.