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cartoon lungs respiratory system oxygen carbon dioxide - Two lungs extract oxygen, release carbon dioxide
world kidney day human lung watercolor painting anatomy respiratory system - Colorful watercolor painting of human lung
world bronchiectasis day human lungs anatomy oxygen exchange carbon dioxide - Anatomy of human lungs with decorative elements
world asthma day human lung healthy lung green watercolor breathing - Green watercolor depicts healthy human lung
world kidney day lungs oxygen carbon dioxide respiratory system - Colorful, stylized healthy lungs with abstract elements
