The condition of being deprived of oxygen. A condition which will end your life if not corrected quickly. There are several possible causes.
Strangulation drowning inhaling various noxious chemicals, electric shock and loss of blood are the most common causes. Regardless of cause, the results are the same - all of the bodies tissues rely on oxygen to perform properly, and will begin to fail. The brain will go first, after which the rest of the organs don't really matter. Loss of consciousness comes first, brain damage and eventual death follows close behind.