Tigers have the largest canines of all the big cats, up to 3 inches long. The teeth are filled with pressure sensitive nerves to help guide the cat to bite down in the right place to quickly kill their prey.
For more information on tiger anatomy, including teeth and jaws visit: http://www.jvbigcats.co.za/tigeranatomy.htm or purchase, "Tiger-The Ultimate Guide" by Valmik Thapar, 2004
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From Tiger Gallery