Tim Allen. This is the latest accepted revision, reviewed on 7 April 2017. For those of the same or a similar name, see Timothy Allen (disambiguation). Timothy Allen Dick (born June 13, 1953), known professionally as Tim Allen, is an American actor, comedian and author.
Not necessarily. Some of the symptoms of low oxygen can be shortness of breath, fast heart rate, changes in the color of the lips and fingernails, but some people will have a low oxygen level without experiencing any of these symptoms. Others may experience these symptoms without having a low oxygen level.
Oxygen is possibly our most basic human need. People can begin to experience brain damage after as few as five minutes without oxygen. There are several things that may prevent you from getting the oxygen you need. Environmental risks such as high amounts of smoke, high altitudes or carbon monoxide can prevent you from breathing in oxygen.