| 1
.
| Body hyoid bone |
| 2
.
| Epiglottic cartilage (covered by fibrous tissue) |
| 3
.
| Remnant of thyroglossal duct (cut off) |
| 4
.
| Upper pointer: Middle laryngeal gland Lower pointer: Appendix laryngeal ventricle (opened) |
| 5
.
| Upper pointer: Elastic laryngeal membrane (quadrangular membrane) Lower pointer: Stem of epiglottis |
| 6
.
| Ventricular fold (ventricle opened) |
| 7
.
| Thyroid cartilage |
| 8
.
| Thyroarytenoid muscle (a few fibers pass superiorly as the thyroepiglotticus muscle ) |
| 9
.
| Aberrant fibers of cricoepiglottic muscle |
| 10
.
| Lateral cricoarytenoid muscle |
| 11
.
| Upper pointer: Area of attachment of deep fibers of cricothyroid muscle Lower pointer: Articular surface of thyroid |
| 12
.
| Arch of cricoid cartilage |
| 13
.
| Greater horn hyoid bone |
| 14
.
| Lateral thyrohyoid ligament (enlargement marks position of triticeal cartilage) |
| 15
.
| Superior horn thyroid cartilage (cut across) |
| 16
.
| Inferior pharyngeal constrictor muscle (reflected posteriorly) |
| 17
.
| Tunica of pharyngeal mucosa (external aspect) |
| 18
.
| Piriform recess (opened) |
| 19
.
| Anastomotic branch superior laryngeal nerve (cut off) with inferior laryngeal nerve |
| 20
.
| Prevertebral fascia |
| 21
.
| Arytenoid cartilage |
| 22
.
| Anterior branch inferior laryngeal nerve |
| 23
.
| Posterior cricoarytenoid muscle |
| 24
.
| Posterior branch inferior laryngeal nerve |
| 25
.
| Inferior laryngeal nerve |
