What is the lumen of the esophagus?

Related questions

1. What causes a weakened lower esophageal sphincter?
2. How does the esophagus aid in digestion?
3. How is the esophagus adapted to its function?
4. What forms the lower esophageal sphincter?
5. What passes through esophageal hiatus?
6. What nerve controls the lower esophageal sphincter?
7. What is the Oesophagus function?
8. What causes relaxation of esophageal sphincter?
9. Which foods relax the esophageal sphincter?
10. Is milk good for GERD?

Tags

1. #lumen
2. #hollow
3. #travel
4. #reach
5. #inside
6. #muscular
7. #connects
8. #esophagus
9. #trachea
10. #behind
11. #front
12. #stomach
13. #throat
14. #through
15. #swallowed
16. #liquids
17. #called
18. #spine
19. #windpipe