Final answer:
GERD is the acronym for stomach contents refluxing into the esophagus due to a malfunctioning esophageal sphincter, resulting in the replacement of normal esophageal cells with resistant stomach cells known as Barrett's Esophagus.
Explanation:
Gastroesophageal reflux disease (GERD) is the acronym for the condition where stomach contents reflux into the esophagus due to the improper closure of the lower esophageal sphincter. For instance, normal esophageal cells are replaced by stomach columnar cells which are resistant to stomach acidity, a condition known as Barrett's Esophagus.
Learn more about Gastroesophageal reflux disease (GERD) here:
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