2. Upper part of omo-hyoid muscle.
3. Inferior constrictor of pharynx.
4. Cricoid cartilage.
5. Crico-thyroid muscle.
6. Thyroid body.
7. Inferior thyroid artery of thyroid axis.
8. Sternal tendon of sterno-mastoid muscle, turned down.
9. Clavicular portion of sterno-mastoid muscle, turned down.
10. Clavicle.
11. Trapezius muscle.