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As with all mammals - of which the cheetah is one - the main organs of respiration are the lungs, where oxygen from the atmosphere diffuses across the thin membrane separating the air in the ALVEOLI (the smallest, sac-like structures in the air-containing part of the lungs) into the bloodstream; and carbon dioxide - the product of the energy-producing reactions in the body - travels in the opposite direction, to be expelled to the atmoshere.

The heart is also important in respiration, as it is responsible for pumping de-oxygenated blood to the lungs, where it becomes oxygenated; and also drawing the oxygenated blood from the lungs and pumping it into the arterial system for distribution around the body.

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10y ago

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