1 Thyrohyoid muscle
2 Sternohyoid muscle
3 Epiglottis (cartilage)
4 Laryngeal vestibule
5 Hypopharynx
6 Aryepiglottic fold
7 Submandibular gland
8 Inferior constrictor muscle of pharynx
9 Platysma
10 Common carotid artery
11 Cervical vertebra C4 (body)
12 Longus colli muscle
13 Internal jugular vein
14 Longus capitis muscle
15 Longissimus capitis muscle
16 Sternocleidomastoid muscle
17 External jugular vein
18 Spinal nerve (C4)
19 Spinal cord
20 Spinal nerve (C3)
21 Spinalis cervicis muscle
22 Vertebral artery
23 Deep cervical veins
24 Spinal nerve root (C5)
25 Longissimus cervicis muscle
26 Middle scalene muscle
27 Semispinalis cervicis muscle
28 Levator scapulae muscle
29 Splenius capitis muscle
30 Splenius cervicis muscle
31 Nuchal ligament
32 Semispinalis capitis muscle
33 Trapezius muscle