Definition of laggard in US English - a person who makes slow progress and falls behind others Definition of laggard in US English - a person who makes slow progress and falls behind others dictionary
Unconsciousness occurs within about 30 seconds, so it's not as if you would have very much time to contemplate what is happening. Once the brain goes unconscious, tissue begins to die after about 5 minutes of oxygen starvation. After this point, there may only be small islands of activity remaining in various brain structures. After ten to fifteen minutes, complete brain death will usually occur. One exception to this is if the brain (and body) are in a state of hypothermia. Extreme cold can induce a process called neuroprotection; metabolism is greatly reduced, and the brain can survive for much longer than it would at room temperature.
A patient is brain dead when all brain and brain stem functions cease and they cannot breath on their own. Once the patient is declared brain dead, the person is legally dead. A brain dead person can be maintained on a breathing machine that provides oxygen to their heart and other organs. Despite declaration of death, the organs can be kept healthy for organ donation by providing them blood supply and oxygen. All donors in New York and the U.S. are either brain dead or dead by cessation of a heart beat before they are eligible to donate organs.