thyroid Hyoid bone Median thyrohyoid ligament Thyroid cartilage Arytenoid cartilage Cricoid cartilage Left lung Right lung Left brachicephalic vein Right brachiocephalic vein Vocal cords epiglottis Cricothyroid ligament Thyroid gland

1 Hyoid bone

4 Median thyrohyoid ligament

7 Thyroid cartilage

10 Epiglottis

11 Arytenoid cartilage

12 Cricoid cartilage

13 Cricothyroid ligament

14 Cricotracheal ligament

15 Cricothyroid muscle

16 Thyroid gland

17 Tracheal cartilages

18 Vocal cords

25 Left lung

45 Right brachiocephalic vein

46 Left brachiocephalic vein