This thing is an anatomic model of the human's left hand. The bones, muscles and tendons are seperate files so it can be printed with multi material printers. I used Prusa's Multi Material Upgrade 2.0. I've also attatched a complete version of the model, to print it with single material printers.
You need support material in order to print this model. But I printed it with supports only at the bottom of the hand (see the third picture). Some little details of the bones at the upper part of the model didn't print perfectly with this little support, but it was possible to clean the model with a little bit of sanding.
It's a rather complex model, but it's worth the effort! It looks amazing once finished :)
Support is only needed at the lower part of the model (see the third picture)!