Disc intervertebral
<a href="//commons.wikimedia.org/wiki/User:Jmarchn" title="User:Jmarchn">Jmarchn</a>
CC BY-SA 3.0
Own work based on: <a href="//commons.wikimedia.org/wiki/File:716_Intervertebral_Disk.jpg" title="File:716 Intervertebral Disk.jpg">716 Intervertebral Disk.jpg</a>