1 = 2 + 3 — Inferior constrictor; 2 — Cricopharyngeal part; Cricopharyngeus; 3 — Thyropharyngeal part; Thyropharyngeus; 4 = 5 + 6 — Middle constrictor; 5 — Ceratopharyngeal part; 6 — Chondropharyngeal part; 7 = 8 + 9 + 10 + 11 — Superior constrictor; 8 — Glossopharyngeal part; 9 — Mylopharyngeal part; 10 — Buccopharyngeal part; 11 — Pterygopharyngeal part; 12 — Pharyngobasilar fascia; 13 — Levator veli palatini; 14 — Tensor veli palatini; 15 — Maxilla; 16 — Pterygomandibular raphe; 17 — Buccinator; 18 — Stylopharyngeus; 19 — Styloglossus; 20 — Depressor anguli oris; 21 — Digastric, anterior belly; 22 — Mylohyoid; 23 — Hyoglossus; 24 — Body of hyoid bone; 25 — Median thyrohyoid ligament; 26 — Thyroid cartilage; 27 — Thyrohyoid membrane; 28 — Prevertebral layer; 29 — Cricothyroid; 30 — Trachea; 31 — Oesophagus
