Amazing fact: Blood vessels
If the blood vessels were laid from end to end, they would reach around the world four times.
Amazing fact: Human body
The average human body contains enough: iron to make a 3 inch nail, sulphur 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 2200 match heads, and water to fill a ten-gallon tank.
Amazing fact: Sperm
About 500 million sperm mature every day in a normal male adult.
Amazing fact: brain
To make brain freeze pass faster, press your tongue against the top of your mouth.
Amazing fact: breathe
During a 24-hour period, the average human will breathe 23,040 times.