1 Anterior jugular vein
2 Sternohyoid muscle
3 Sternothyoid muscle
4 Platysma
5 Thyroid gland
6 Sternocleidomastoid muscle
7 Esophagus
8 Trachea
9 Common carotid artery
10 Vagus nerve (X)
11 Internal jugular vein
12 Inferior thyroid artery
13 Longus colli muscle
14 Phrenic nerve
15 External jugular vein
16 Anterior scalene muscle
17 Spinal nerves (C5, C6, and C7)
18 Vertebral artery
19 Cervical vertebra (C7)
20 Spinal cord
21 Middle scalene muscle
22 First rib
23 Posterior scalene muscle
24 Transverse process of vertebra
25 Spinal nerve root (C8)
26 Serratus posterior superior muscle
27 Levator scapulae muscle
28 Spinalis cervicis muscle and multifidus muscle
29 Iliocostalis cervicis muscle
30 Semispinalis cervicis muscle
31 Longissimus cervicis muscle
32 Interspinous ligament
33 Splenius cervicis muscle
34 Trapezius muscle
35 Semispinalis capitis muscle
36 Rhomboid minor muscle
37 Splenius capitis muscle
2 Sternohyoid muscle
3 Sternothyoid muscle
4 Platysma
5 Thyroid gland
6 Sternocleidomastoid muscle
7 Esophagus
8 Trachea
9 Common carotid artery
10 Vagus nerve (X)
11 Internal jugular vein
12 Inferior thyroid artery
13 Longus colli muscle
14 Phrenic nerve
15 External jugular vein
16 Anterior scalene muscle
17 Spinal nerves (C5, C6, and C7)
18 Vertebral artery
19 Cervical vertebra (C7)
20 Spinal cord
21 Middle scalene muscle
22 First rib
23 Posterior scalene muscle
24 Transverse process of vertebra
25 Spinal nerve root (C8)
26 Serratus posterior superior muscle
27 Levator scapulae muscle
28 Spinalis cervicis muscle and multifidus muscle
29 Iliocostalis cervicis muscle
30 Semispinalis cervicis muscle
31 Longissimus cervicis muscle
32 Interspinous ligament
33 Splenius cervicis muscle
34 Trapezius muscle
35 Semispinalis capitis muscle
36 Rhomboid minor muscle
37 Splenius capitis muscle