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The Histology of the Common Frog by Rose B. Ankeny, 1887

The Histology of the Common Frog by Rose B. Ankeny Edgar, 1887, Page 18

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16. [underlined] The Tongue. [/underlined] The frogs tongue is large, fleshy free behind and fastened in front and serves the purpose of catching food. In doing this the back part is projected forward out of the mouth and over the object to be caught, and as the tongue is covered with sort of a viscid saliva, insects, which constitute the essential part of the food of the animal, adhere to it and are carried back into the mouth. The tongue also acts to close the internal openings of the nostrils in the act of breathing. This organ
 
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