A diagram of the human nervous system.
<a href="//commons.wikimedia.org/wiki/User:Tambo" title="User:Tambo">Tambo</a> <a href="https://en.wikipedia.org/wiki/User:Persian_Poet_Gal" class="extiw" title="en:User:Persian Poet Gal">Persian Poet Gal</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Nervous_system_diagram.png" title="File:Nervous system diagram.png">File:Nervous_system_diagram.png</a>