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The digestive system of amphibians is adapted to their dual life, being both aquatic and terrestrial, and shows a relatively simple organization compared to higher vertebrates. The alimentary canal begins with a wide, muscular mouth, often equipped with small, conical teeth in the upper jaw to grasp prey, while the lower jaw usually lacks teeth. The tongue is highly specialized in many amphibians, being muscular and sticky, and can be _______ _________ ________ ___ ____ _____ ____ __________ _____ __________.
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