When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Enamel is hardest substance in the human body.
61
Every year your body replaces 98% of your atoms.
119
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human body contains over a billion miles of DNA.
147
One human hair can support 3 ounces.
191
Your heart will pump about 212 million liters in its lifetime.
26
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18