Upper and Lower jaw of Monitor
The jaws of monitor lizard is flexible and has a U shape. The teeth are conical and arranged facing backward. Teeth has serrations that helps them to rip the meat from the flesh. The jaws are powerful and has a wider gape, they can widen their throat by dropping the lower jaw.
About the animal
There are at least 50 known species of monitor lizards, with new ones being discovered all the time. Some have been known to be as small as 8 inches, but most (such as the Nile monitor lizard that has become popular in Florida) can be quite large. They have long necks and sturdy limbs. Their claws are very sharp, and their tails typically account for half of their body length. Most species of monitor lizards stick to the ground, but some prefer to make their homes in trees or near water. Almost all species of monitor lizards are carnivorous, though a few will eat fruit.
David P. Badge, Lizards, MBI publishing Company, USA, 2006.