Let's try this again…
It was a while before I could find time to compile a collection from my archive without a lot of useless extra crap in it. 2.29 GB worth. Be warned, this is essentially all RL gore images so steel yourself against revulsion and treat it like the resource of raw reference images it was intended to be. Don't come bitching at me because you saw something that angered you.

https://mega.nz/#!XwFmBQbb!_n5fuOGPjQp8bxHdOG2PxuK2dk6ofkp0LiipMGwikJY

They're not all gems but much of it should be useful. Remember that dead flesh can look vastly different from live flesh, as can pathological specimens, but unless obviously diseased, desiccated or bloated the structure appears the same as in healthy tissue.

I'll see if I can't come up with more assets taken from past photomanipulations.