Help you breathe they breathe air in and out....
what else would they do have a social life and eat and drink and sleep then eat some more??
Lol
By Me!!!
All have lungs,
As tadpoles they have gills and swim in the water all day, but when they become frogs they produce lungs and lungs need oxygen. So yes they do need oxygen.
All mammals breathe with lungs.
ALL dogs have lungs.
All snakes have lungs.
Yes, ALL snakes, indeed all reptiles have lungs.
All mammals have lungs with which to breathe.
All mammals Breathe with lungs, for a start.
Yes. All mammals have lungs.
Yes, ALL birds have lungs.
Yes, bats are mammals and all mammals have lungs.
All mammals breathe with lungs.