Since frogs spend most of their lives in water there is a huge advantage to having a redundant system of getting oxygen. The need for a frog to be able to breathe without surfacing during the winter months makes "skin breathing" very advantageous. The use of lungs is effective when the frog is on the surface (especially when completely out of the water).
Amphibians have thin and delicate skin, which is mad of very little keratin. they tend to use their skin as a "second-respiratory" system. Their lungs are are also used as a respiratory system. They have 2 lungs.
When amphibians are larvae (babies), they have gills, but most adult amphibians breathe with a pair of lungs excluding salamanders.
No, there are some newts and salamanders that do not transform all the way and keep their gills.
No. Larvae have only gills, adults have only lungs (except in the axolotl, which keeps its gills, and lungless species which breathe through their skin).
No. Larval amphibians breathe through gills.Some salamander retain those gills into adulthood. Still other salamanders breathe through their skin.
Yes
partly gills, partly lungs
Lungs Amphibians actually do have lungs. They lack most of the glands that we humans have.
No, all modern amphibians do not only use their lungs for respiration. They can also respire through their skin and tissues in the lining of their mouth.
No they do not even have lungs
Reptiles always breathe with lungs. Amphibians may breathe with lungs, gills or through their skin.
When amphibians are babies, they have gills, but most adult amphibians breathe with a pair of lungs excluding salamanders.
Well they have limbs and lungs, which I would consider more complex.
Amphibians use their lungs for respiration, but they also absorb oxygen through their skin. They breath underwater by absorbing dissolved oxygen in the air or gills.
The adults do.
A amphibian has neither lungs or gills
Fish have gills all their lives while amphibians eventually begin using their lungs. Fish have scales, and they must live in water to survive.
yes