What is the Cardiac Sphinctur?
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The upper oesophageal sphincters. The lower esophageal sphincter, or cardiac sphincter, at the upper portion (cardia) of the stomach. This sphincter prevents the acidic contents of the stomach from moving upward into the esophagus.
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Explanation:
Opening of the upper oesophagal sphincter is triggered by the swallowing reflex. It is also called the cardiac sphincter or cardio oesophageal sphincter, named from the adjacent part of the stomach, the cardia.
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