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Schematic representation of conductive and respiratory zones of the lung. Tracheal, bronchial and alveolar regions are showed with their vascular network. In the magnified area, detailed representation of the alveolar region showing the diversity of epithelial, vascular and mesenchymal cells within (alveolar type I, alveolar type II, endothelial cell, fibroblast, pericyte, macrophage). Left schematic was adapted by servier medical art website (smart.servier.com).
