This <i>W3C-unspecified</i> <a href="https://en.wikipedia.org/wiki/Vector_images" class="extiw" title="w:Vector images">vector image</a> was created with <a href="https://en.wikipedia.org/wiki/Inkscape" class="extiw" title="w:Inkscape">Inkscape</a> .
Olek Remesz (wiki-pl: <a href="https://pl.wikipedia.org/wiki/Wikipedysta:Orem" class="extiw" title="pl:Wikipedysta:Orem">Orem</a>, commons: <a href="//commons.wikimedia.org/wiki/User:Orem" title="User:Orem">Orem</a>)
CC BY-SA 2.5
Own work, based on <a href="//commons.wikimedia.org/wiki/File:Gray385.png" title="File:Gray385.png">this picture</a> from <a href="https://en.wikipedia.org/wiki/Gray%27s_Anatomy" class="extiw" title="en:Gray's Anatomy">Gray's Anatomy</a>.