Pulse is short for pulsations which is the word used to describe the feeling of a heartbeat the definition for pulsation: the rhythmic contraction and expansion of the arteries with each beat of the...
it is someone who is on a life support machine due to the fact that they can't breathe on their own. which is also a state and often prolonged unconsciousness; usually the result of disease or injury.
In many cases, from a severe head injury but there are many other causes for comas. Also comas can be caused from lack of oxygen to the brain such as if one was to fall unconcious underwater they may...