Lisa Nilsson makes these incredibly intricate illustrations of cross-sections of the human body from paper filigree. She discussed the process of making her work in a recent interview with All Things Paper:

I’ll use anything close to hand that gets the job done – pins, needles, dowels, drill bits. I have a bona fide quilling tool, but often I don’t like the little initiating crimp it makes in the paper, so I usually opt for a pin or needle.

[via laughing squid]