oxygen
You need your lungs to breathe. Without lungs, you'd be dead.
You need lungs to breathe.
Of course. They need lungs to breathe.
snakes and frogs need lungs to help them breath becuse when they grow they don't grow with gills they grom with lungs instead.
lungs are tubes that transfer blood from your heart to your lungs and other parts of your body. (doesn't need to be improved)
your lungs
Lungs.
No, you need lungs for that.
lungs
Yes, they do have lungs as they need to breath air.
lungs
100%