Macro photo of a cat cleaning itself, showing the hooked papilla on the tongue.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/45206157@N00">Jennifer Leigh</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/45206157@N00/388846359">Flickr</a>