1 — Left main bronchus; 2 — Parabronchial diverticulum; 3 — Trachea; 4 — Inferior constrictor; 5 — Zenker diverticulum; 6 — Right main bronchus; 7 — Oesophagus, thoracic part; 8 — Epiphrenic diverticulum; 9 — Diaphragm; 10 — Oesophagus, abdominal part
