human beings need nitrogen for building proteins and o2
Oxygen is used to help people breathe in and out
Humans can Not survive on Saturn. The giant gas planet has a gravitational pull that would crush a human being in seconds. It is not possible for a human being to survive on Saturn for more than mere seconds.
Humans need oxygen to survive. Oxygen is necessary for cellular respiration, which allows our cells to produce energy. Without a steady supply of oxygen, our organs and tissues would not function properly.
Because
It needs the human bodies temperature to survive.
Our body needs oxygen gas to make energy and survive.
oxygen
80%
Cows can't survive on gas alone. Neither can humans. Both cows and humans need food and water to survive, not just oxygen (which is a gas we breathe).
oxygen
so the human race can survive by reproducing
Strictly speaking: if you can do without it, you don't need it.