The tongue of anurans is attached at the front of the mouth instead of the rear and is covered with a sticky substance. making it an efficient trap for prey. It also produces mucus to help in swallowing. Although they cannot chew, most anurans have teeth, which are used to grasp prey. All frogs and toads blink when they swallow. Since no bone exists between the eye and the mouth. the eye is pushed against the roof of the mouth, forcing the food farther back. regions.