Their lungs.
I'm not sure but I think the Galapagos tortoise breathes through its 2 lungs which are situated on their backs.
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.
If you look close up on a tortoises head, they have one little hole at either side of there head, like us there have noise holes witch they breathe out of. I hope i helped. :DTortoises Do have noses (and mouths) you know! If you look closely at a tortoise's face, it has two little nostrils!
You need lungs to breathe.
Parrots breathe with lungs.
Their nostrils or nose.
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.
Emus breathe using lungs.
Earthworms breathe through their skin.
No fish breathe through their gills. (simiar organ to lungs yet functions differently)
The brain stem.
Fish breathe through gills these are their lungs.