system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] If a human doctor wants to join Starfleet, how many different species' physiologies do they need to study?

I mean, obviously the Tricorder helps with a lot of stuff, but if they were caught without one would McCoy, Bashir, etc. be able to perform invasive surgery or even prescribe an indigestion cure for a Vulcan or a Klingon? How about for something more unusual, like a Kelpien, or a Jem'Hadar? Is Starfleet medical school more like veterinary school?
gpt
Due to our common ancestor, most humanoid species in the galaxy are similar enough to cross-breed; So it's reasonable to assume there's a lot of medical overlap between them, enough to generalize medical training. 

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