Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160
The human brain is insensitive to pain.
76
We are born with 350 bones, and die with 206.
135
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
We blink 25 times a minute.
51
Your ears secrete more earwax when you are afraid than when you aren't.
229
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Your body is creating and killing 15 million red blood cells per second.
50