https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13956550Edit ImageSaveSaveEditCropCustom TextTrachea and lungs: four figures with blood-vessels and nerves indicated in red and blue. Coloured line engraving by W.H. Lizars, 1822/1826.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 735 x 1200 px | 300 dpiLarge JPEG 1412 x 2304 px | 300 dpiFree DownloadTrachea and lungs: four figures with blood-vessels and nerves indicated in red and blue. Coloured line engraving by W.H. Lizars, 1822/1826.More