Frog link for how frogs show enviromental health and Frog Questions

http://www.tropical-rainforest-animals.com/Tropical-Frogs.html

The ear is connected to the mouth. 
Frogs swallow the food and it goes to the small intestine which most of the digestion is done, then the food goes into the large intestine where the waters gets taken or sperated from food.  The last part of digestion is the waste leaves the body.
Frogs take oxygen in through their mouth, lungs, and skin.
They hibernate in logs or bury themselves in mud.