I would think they breathe with there mouth underwater.
Frogs breathe just like humans, taking in air through their mouths and exhaling it. They are also able to breathe through their skin.
Actually frogs dont breathe from their lungs. They have lungs but they don't use them because their skin is so thin that they can breathe from it.
Bats breathe through their mouths and noses.
For the most part, frogs breathe air through the mouth, and utilize internal nares when doing so outside of the water. In the water, they can put just enough of the external nares above water, but this is more important to get rid of carbon dioxide, as frogs can diffuse oxygen from the water through their skin.
Frogs have lungs just like you do. Tadpoles, however, have internal gills until they turn into frogs. Frogs breathe by pulsing their throat to suck air into and out of their lungs.
by having a zygote
The genitals
Because they need big enough mouths to get some of those big bugs in their mouths that they eat.
Cows need a nose to breathe. They eat a lot of grass with their mouths so they use their nose to breathe.
Frogs and other amphibians.
don't know external gills
with their mouths