3. Scalenus posticus muscle.
4. Splenius muscle.
5. Mastoid insertion of sterno-mastoid muscle.
6. Internal maxillary artery passing behind the neck of lower jaw-bone.
7. Parotid duct.
8. Genio-hyoid muscle.
9. Mylo-hyoid muscle, cut and turned aside.
10. Superior thyroid artery.
11. Anterior half of omo-hyoid muscle.
12. Sterno-hyoid muscle, cut.