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Rows of tall airway ciliated columnar epithelial cells stand side by side in this cross-section panel, topped by a dense fringe of hairlike cilia. Each column carries an oval nucleus, while rounder cells cluster near the bottom and the whole layer rests on a thick, ridged basement membrane. The fluted surface makes cell shapes and boundaries easy to see and to trace with a finger. A useful cell biology display for a classroom, lab or study desk, showing how the lining of the respiratory tract is built.

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