On average...

the human body contains enough...

• iron to make a 3 inch nail
• sulfur to kill all fleas on an average dog
• carbon to make 900 pencils
• potassium to fire a toy cannon
• fat to make 7 bars of soap
• phosphorous to make 2,200 match heads
• water to fill a ten-gallon tank

This isn't a new finding...

But I thought it was interesting nonetheless...

"Pain from any injury or illness is always registered by the brain. Yet, curiously, the brain tissue itself is immune to pain; it contains none of the specialized receptor cells that sense pain in other parts of the body. Thus, the pain associated with brain tumors does not arise from brain cells but from the pressure created by a growing tumor or tissues outside the brain."

Another marvel of the human body

Sources: http://www.pbs.org/wnet/brain/3d/, http://www.arcamax.com/trivia/s-142594-750125, http://www.mayoclinic.com/health/pain/PN00017, http://biology.about.com/od/humananatomybiology/a/anatomybrain.htm