That's more a case of biology, but it illustrates one of the liberties taken. Perhaps, when in a state of hypothermia, it may be possible to survive on that low an oxygen concentration but I doubt it. The frostbite issue is another the producers seemed happy to ignore once the ordeal was over.Yes, like staying alive at 37,000 feet.
I look at the movie as sort of a reality-based Jules Verne tale and it does that well. I encourage those with Prime to give it a view.
Happy New Year to you too.