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                                                Esophagus, dog - histology slide
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                                                Image by John Alan Elson, via Wikimedia Commons. 
 Original file source: https://commons.wikimedia.org/wiki/File:Dogesophagus100x2.jpg
 
 Title: "Dogesophagus100x2.jpg"
 
 No changes were made to the original image downloaded.
 
 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. https://commons.wikimedia.org/wiki/Commons:GNU_Free_Documentation_License,_version_1.2
 
 This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
 
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