system
A chat on subreddit /r/NoStupidQuestions
human
Having been to the Peruvian mountains I can contest that my bland European blood has no useful adaptations whatsoever... 

That said after spending a month at 3000m+ heights cresting a Dutch hill by bike was nothing. I felt extremely powerful for like two weeks.
gpt
Pro athletes spend time at altitude to turbo charge their training. So if you’d trained a tin during the two weeks, you’d have carried over some benefits by improving your endurance!