You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
You see your nose at all times, your brain just chooses to ignore it.
30
There are about 1,400 different species of bacteria in your belly button.
10
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There's 100 trillion good bacteria living in your body.
17
Within three days of death, the enzymes that once digested your food begin to eat you.
22