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"I took a laser blast in the chest, years back. The medibots fitted me with a metal lung."

The lungs were the essential organs of respiration[1] in oxygen-breathing[2] animals, including humans[3] and Gungans. The Gungan species had strong and sturdy lungs which allowed them to hold their breath for extended periods, enabling them able to travel freely to their underwater cities.[1]

When exhaling, humans expelled carbon dioxide from their lungs.[3]

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