Oxygen Tank + mask
Aqualung.
Divers wear tanks full of oxygen to help them breathe while they are under water. When the tanks start to get empty, they resurface.
aqualung, snorkle, SCUBA tank
A SCUBA (self-contained underwater breathing apparatus) tank
a breathing tank! try it its fun! (underwater swimming)
Scuba
It's called an aqualung
I may be wrong, but im pretty the sure system that helps you breathe is called "life support" i think it runs your heart for you and helps you breathe.
the risks the diver most was holding their breathe using nose clips for long time
because it helps you breathe eaiser. - Ted Doofinshimrtz because it helps you breathe eaiser. - Ted Doofinshimrtz
A snorkel longer than 1 meter (about 3 feet) will make it impossible to breathe as the water pressure on the chest will make it impossible for him to expand his chest and fill his lungs. A diver below this depth will need to breathe pressurised air from a tank.