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An emphysema lung slice cut into a wedge-shaped cross section, showing enlarged air spaces where the delicate walls between alveoli have broken down. Large irregular holes honeycomb the cut face, finer porous tissue gathers along one edge, and small pigment deposits speckle the surface beside thin branching airways. It makes a powerful anatomy and health class model for lessons on lung disease and the effects of smoking, a visual aid for respiratory therapy students, or a sobering specimen for a medical classroom shelf.

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