MCQ Anatomy Answer 014

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The correct answer is C.


Clinical Anatomy & Physiology of the Swallow Mechanism (Dysphagia Series)The muscularis of the upper third of the esophagus (choice E) is composed entirely of striated muscle. The middle third (choice C) contains both striated and smooth muscle. The lower third (choice B) and lower esophageal sphincter (choice A) contain only smooth muscle. There is no such thing as the upper esophageal sphincter (choice D).

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