Identify the following:

1. trachea

2. esophagus

3. right common carotid artery

4. left common carotid artery

5. left vertebral artery

6. right vertebral artery

7. left internal jugular vein

8. left vertebral vein

9. right vertebral vein

10. right and left lobes of thyroid gland

11. left subclavian artery

12. left lung apex

13. anterior scalene