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Sliced open along one side, this human lung lobe cutaway shows the bronchial tree branching from the windpipe into ever smaller airways. Ringed trachea and bronchus sections lead down into fine bronchioles, each ending in little grape-like clusters of alveoli spread across the cut face. The outer surface keeps its textured tissue and lobe fissures. A clear and attractive teaching model for an anatomy or respiratory health lesson, a medical student's desk or a classroom science display.

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