What are the constrictions of Oesophagus?

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Tags

1. #sphincter
2. #esophagus
3. #approximately
4. #where
5. #corresponds
6. #cervical
7. #vertical
8. #follows
9. #constrictions
10. #course
11. #first
12. #cricopharyngeal
13. #upper
14. #vertebra
15. #commences
16. #portion
17. #teeth
18. #narrowest
19. #constriction
20. #incisor
21. #sixth