Diagram of the internal anatomy of a female two-lunged spider.
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;">John Henry Comstock</div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="//commons.wikimedia.org/wiki/User:Pbroks13" title="User:Pbroks13">Pbroks13</a></div> (Ryan Wilson)
CC BY 3.0
<ul><li>Anatomical information and <a href="//commons.wikimedia.org/wiki/File:Spider_internal_anatomy.png" title="File:Spider internal anatomy.png">original diagram</a> from <i>The Spider Book</i> (1912, 1920) by John Henry Comstock</li>
<li>Additional anatomical information from <i>Biology of Spiders</i> (1996) by Rainer F. Foelix</li></ul>