interior lung

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19 Esophagus

20 Trachea

21 Bifurcation of trachea

22 Right Bronchus

23 Left Bronchus

Superior Lobar Bronchus

Inferior Lobar Bronchus

55 Aortic arch

56 Descending (thoracic) aorta

57 Thoracic vertebrae

58 Intervertebral disc

Esophagus Trachea Bifurcation of trachea Right bronchus Left bronchus Aortic arch Intervertebral disc Thoracic vertebrae Superior lobar bronchus Inferior lobar bronchus Descending aorta