basic anatomy of nephron
<a href="//commons.wikimedia.org/wiki/User:%D7%99%D7%95%D7%A1%D7%99_%D7%94%D7%A8%D7%90%D7%A9%D7%95%D7%9F" class="mw-redirect" title="User:יוסי הראשון">Yosi I</a>
CC BY 3.0
self-made, a small bit is copied from the public domain <a href="//commons.wikimedia.org/wiki/File:Gray1130.svg" title="File:Gray1130.svg">Image:Gray1130.svg</a>