so a person/animal will still live when all their blood is drained?
No, it won't. Likewise, a perosn will not live if the brain is removed. Does that mean "life is in the brain?"
I believe what Force is saying is that singling out blood as where life is, is scientifically inaccurate because the body requires many substances and features in order to work. Life is in the combination of everything, not in any one thing.
people who are completely brain dead can be kept alive on life support for many years. The bodily functions do not require the brain when life support is turned on.
I'm really just being cheeky here... but i think they call it a 'vegetative state'
Being in a vegetative state does not equate to being brain dead. It equates to the higher functioning of the brain being lost or impeded in some way. The lower functions, the autonomic stuff, still functions. If the brain stops working completely, then body dies because there is nothing to tell the brain to beat, the lungs to contract, ect, etc.