Final answer:
Oxygen provides energy for the heart to beat through cellular respiration and ATP production in mitochondria.
Explanation:
Oxygen is the atom involved in giving your heart energy to beat. Oxygen is utilized in cellular respiration to produce ATP in the mitochondria, which is essential for heart function and providing energy for muscle contractions.
Iron in hemoglobin is crucial for binding oxygen in red blood cells, enabling oxygen transport to cells for energy production. Carbon monoxide poisoning inhibits oxygen binding due to carbon's interaction with iron in hemoglobin.
Mitochondria in heart cells use oxygen to generate ATP, the primary energy source for muscle contractions, including the heart's rhythmic beating.
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