â¢ The critical path is defined as the longest path through the CPM network and consists of those activities. that determine the shortest time for project completion. Activities within this or list form a series (or. sequence) of logically connected activities that is called the critical path.
Time is very important when an unconscious person is not breathing. Permanent brain damage begins after only 4 minutes without oxygen, and death can occur as soon as 4 to 6 minutes later. Machines called automated external defibrillators (AEDs) can be found in many public places, and are available for home use.
What happens if your lungs stop working?   Lungs supply oxygen to your blood and they also clear waste carbon dioxide. If they stop working your blood loses oxygen and starts to build up an excess of waste carbonâ¦ dioxide. Muscles and other tissue can survive quite a long period without oxygen, but the brain cannot. Shortage of oxygen to the brain will cause you to lose consciousness.