upper esophageal sphincter
pharyngoesophageal sphincter
The upper esophageal sphincter (UES) (also called the Pharyngoesophageal sphincter) refers to the superior portion of the esophagus. Unlike the lower esophageal sphincter, it consists of striated muscle and is under conscious control. The primary muscle of the UES is the cricopharyngeus portion of the inferior pharyngeal constrictor. During swallowing the upper esophageal sphincter opens so the bolus can pass into the esophagus. A secondary role of the UES is to reduce backflow from the esophagus into the pharynx.
| Tür | Muscle |
| Ana Yapı | striated muscle sphincter |
| Latince Adı | pharyngoesophageal sphincter |
| FMA ID | 265203 |
Sıkça Sorulan Sorular
What is the upper esophageal sphincter?
What is the Latin name for the upper esophageal sphincter?
İlgili Yapılar
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Educational Disclaimer
This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.
Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.
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