Voynich's anatomy

[Jorge_Stolfi]

But the closest match to the intestines I can find is from 1390s in Iran.

That drawing is actually a surprisingly good match to the VMS "intestines", in that it makes the same gross anatomical mistakes:

• the intesines are depicted as a single tube of uniform thickness that zigzags on a plane like a You are not allowed to view links. Register or Login to view.;
  
• there are some incomprehensible frills around the tube, which could have been hatched "3D" shading in the original.
  

That could be a trail worth following...

The ovaries one is more because it resembles a cutaway version that I recall that would not likely have been the style at the time, and upon closer inspection it resembles it only in that way, really.

I don't think that picture was meant to represent ovaries.  Did people at the time know enough about human reproduction to know that the tromps were important?  Why do the tubes at the top have multiple openings? And more... In fact I think that a good part of that figure (like many details of the nymphs) is later additions.

All the best, --stolfi