Here are a few samples of what amazing knitter have put together. They are basically sculptures and are related to my job in medical illustration & photography. If I learn how to knit well enough to design patterns I could possibly come up with a few of my own in the future. That would be lots of fun.
Knitted brain, heart & intestines
Knitted digestive system
Knitted digestive system on Ravelry
And there's the classic Knitted Womb