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The human body uses oxygen in cellular respiration to create energy by oxidizing carbohydrates (mostly sugars), fats, or protein. This process produces carbon dioxide, water, and other chemical by-products. The carbon dioxide is brought through the bloodstream to the lungs, where it is exchanged for more oxygen. The lungs exhale the carbon dioxide along with some water vapor and substantial remaining oxygen.

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12y ago
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15y ago

Carbon dioxide is formed as a waste product of aerobic respiration, a process that takes place in the mitochondria of our cells: glucose + oxygen -------> carbon dioxide + water + energy The oxygen is what we inhale; the CO2 is what we exhale).

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15y ago

aeorobic respiration

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Q: Where is the carbon dioxide that you exhale produced?
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