Lung png icon, transparent background https://www.rawpixel.com/image/9323814/lung-png-icon-transparent-backgroundView licenseThe arteries and lungs (fig. 2), after Haller; the breast (fig. 3), after Nuck; branch of the bronchi (fig. 4), after… https://www.rawpixel.com/image/14011948/image-paper-cartoon-plantFree Image from public domain licenseA cancerous lung and bronchi. Chromolithograph by W. Gummelt, ca. 1897. https://www.rawpixel.com/image/14020442/cancerous-lung-and-bronchi-chromolithograph-gummelt-ca-1897Free Image from public domain licenseThe arteries and lungs (fig. 2), after Haller; the breast (fig. 3), after Nuck; branch of the bronchi (fig. 4), after… https://www.rawpixel.com/image/14019452/image-paper-cartoon-plantFree Image from public domain licenseThe trachea (windpipe) and bronchi. Engraving after G. de Lairesse, 1739. https://www.rawpixel.com/image/13982989/the-trachea-windpipe-and-bronchi-engraving-after-lairesse-1739Free Image from public domain licenseLung icon vector https://www.rawpixel.com/image/533549/premium-illustration-vector-breath-respiratory-system-airView license