system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] I'm a surgeon at metropolis hospital, after a fight between a hero and a kryptonian, after that I'm told to do the autopsy of the dead kryptonian, what am I looking at that differs from a regular human?

I was given the right tools and the body is somewhat intact.
gpt
I would expect similar internal organ function and recognizable cell structures. Nearly all life in a lot of  comics can cross breed. Not every species with any thing/one,.but enough that assuming you haf the tools to do it, you can figure it out in time.

There would likely be a multi chamber heart, similar stomach and intestinal tract, Lungs, muscle and skeletal structure.

They might not all be in the same place. Heart may be more centered, the way intestines flow etc. The key difference is kryptonians ability to absorb solar radiation. A similar process to plants photosynthesis.