Like most other vertebrates, amphibians achieve air-breathing by drawing air into the lungs through the mouth or nose. Intaking oxygen underwater is different - this is done by diffusion across the skin membrane. Amphibian skin is very thin and permeable, oxygen in air or dissolved in water can diffuse through the newt's skin straight into the blood which is in tiny blood vessels (capillaries) close to the surface. BUT! permeability also works the other way, this is why amphibians must spend their lives in water or damp places to avoid dessication. The gills are replaced by lungs as they become adults
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Newts are amphibians and need to breathe. They can live without water for several weeks as long as they are in damp conditions and DON'T dry out. Sometimes you can find newts hiding under stones.
They are amphibians, so they do rely on a watery habitat.
All amphibians adapt to breathing in water because they were born in water, and a quarter of their lives where spent in the water as a fish and when they grow up, they still have a little of that fish in them.
It all depends on the ambiatric muscle tissue in the frogs anus. Yes, though hard to believe, the frog actually respirates out of its butt. Through numerous chemical reactions, the frog is able to extract the fluoride out of the water and can dive to bottoms of deep oceans.