Gastro-esophageal junction

The connection between the lower esophagus and the stomach cardia is known as the gastro-esophageal junction or esophagogastric junction.  Histologically this is the transition between the stratified squamous epithelium from the esophagus to the simple columnar epithelium of the stomach.

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Gastro-esophageal junction.  Notice the abrupt transition between stratified squamous epithelium and simple columnar epithelium.  Annotated version here.(TM: 100x, picture taken with a Nikon Plan Apo 10/0.4 on Sony A7ii)

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