Figure 3 - Transmission electron micrographs of intercellular spaces.
From the following article
Esophageal mucosal defense mechanisms
Roy C. Orlando
GI Motility online (2006)
doi:10.1038/gimo15
The electron micrographs show the differences in size of the intercellular spaces for normal (a) and nonerosive acid-damaged (b) esophageal epithelia. 
9000. (Source: Barlow and Orlando,35 with permission from American Gastroenterological Association.)
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