Their nostrils or nose.
They breathe through a single gill
Their nose.
Earthworms breathe through their skin.
Fish breathe through gills these are their lungs.
No fish breathe through their gills. (simiar organ to lungs yet functions differently)
It needs it to breathe.
No, humans do not breathe through their skin. We breathe in oxygen through our lungs, where gas exchange occurs, and carbon dioxide is released as waste. The skin is an organ designed primarily for protection and sensation.
Snakes breathe using their lungs, like all reptiles. If they are underwater they have to come to the surface to breathe. Amphibians (frogs, newts, salamanders etc) are NOT reptiles. Amphibians often breathe through their skin.
Their lungs.
Like all reptiles, crocodiles and their cousins - caimans, alligators and the gharial - breathe through lungs.
Yes, but they breathe air too, thru the labyrinth organ. In fact if you don't let them get to the top of the tank they can suffocate.
Betta fish breathe air....yes... that's right... they breathe air. They breathe air because they have an organ by their gills that is called the Labyrinth's Organ which allows them to breathe air. They breathe air by coming up to the surface of the water. Then they gather air in their mouths and hold their breath underwater.