That is rather disgusting. I have seen a few pictures (and perhaps videos) of feet that have been cut open. This certainly appears to be the most realistic drawing I've ever seen of one. Then again, I don't know that much about anatomy, so I can't tell if it's accurate. It's hard to tell what's supposed to be what in this. I think the toes are especially done very well. There's so many disgusting things on that feet it's hard to tell what's what.
What really makes it work is that I find it amazing you actually were able to look at a photograph like this for that long. I would have been so disgusted after first glance. It looks like there could be mucus or something in it, in that clear part. You truly do have a good understanding of human anatomy. This is the kind of stuff a surgeon could make!