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Pulmonary alveolus PL.svg Pulmonary alveolus Polish version Pcherzyki pucne schemat Respiratorysystemcompletepl svg UTC Respiratorysystemcompletepl svg LadyofHats translated by biczek cropped Masur talk Other versions diagram Crop Respiratorysystemcompletepl svg LadyofHats original upload log This image is derivative work of the