Mammoth 3D Anatomy Model
Hercules Beetle 3D Anatomy Model	Pig 3D Anatomy Model	Cow 3D Anatomy Model

Forget jigsaw puzzles, over at the Neatorama Shop, we've got some really cool (funducational?) 3D Anatomy Models/Puzzles with removable organs. My favorite is of the Woolly Mammoth and the Snail: Link