I asked a similar question and got an answer from another freeper... I'll find it and be back in a sec...
http://www.freerepublic.com/focus/news/3133545/posts?page=162#162
To: GOPJ
Hypoxia (oxygen starvation) will lead first to unconsciousness then without oxygen, cardiac arrest and death is probably 2-3 minutes after the cabin atmosphere equals the 45,000 pressure.
Essentially its a suffocation death. At least ya pass out first. You are trying to breathe, but its not doing any good.
Cabin heat is controlled separately from cockpit heat. The flight crew controls it from the flight deck. Same for the cargo hold. Cargo has been ruined and pets killed by crews who forget to maintain pressure and temp in the cargo hold.
Freezing would take a bit longer.
162 posted on Saturday, March 15, 2014 5:21:11 PM by Blueflag