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The main fuel for the body's cells is glucose. Glucose because the brain relies solely on glucose as it's source for fuel. Secondly, oxygen because of its role in cellular respiration, which also uses glucose to produce energy in the form of ATP. ATP is an abbreviation for adenosine triphosphate, and all organisms from the simplest bacteria to humans use ATP as their primary energy currency. ATP is a form of energy that the cells can use to power all their activities.. but the fuel is Glucose.

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11y ago

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