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Oxygen passes from blood to mitochondria through a series of diffusion processes. In the lungs, oxygen is inhaled and binds to hemoglobin in red blood cells, which then transport it through the bloodstream. When blood reaches tissues, oxygen diffuses out of the capillaries into the surrounding cells due to a concentration gradient. Finally, within the cells, oxygen travels to the mitochondria, where it is used in cellular respiration to produce energy in the form of ATP.

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2w ago

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