THE BODY HUMAN
'(<a href="http://www.j-archive.com/media/2009-10-23_J_19.jpg" target="_blank">Sarah of the Clue Crew holds a skeletal armbone model at Sawbones.</a>)  For medical education, Sawbones makes bone models pre-fractured in common patterns; <a href="http://www.j-archive.com/media/2009-10-23_J_19a.jpg" target="_blank">this</a> fracture, where two cracks form a triangle, results from bending & is named for this insect'
butterfly