Cross section of an intestinal stone of a horse. Museum Fragonard of the National Veterinarian High School of Alfort, Maisons-Alfort, Val-de-Marne, France
<a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>
Taken on 16 January 2011
<span class="int-own-work" lang="en">Own work</span>