part of part of has part has part organ lower respiratory tract bronchus trachea endoderm-derived structure tracheobronchial tree FMA:7393 The structure from the trachea, bronchi, and bronchioles that forms the airways that supply air to the lungs. The lining of the tracheobronchial tree consists of ciliated columnar epithelial cells. UBERON:0004102 UBERON:0007196 arbor tracheobronchialis tracheobronchial system uberon ciliated columnar epithelium