You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
If you hold farts in during the day, they'll just come out when you sleep.
16
In one day, adult lungs move about 10,000 litres of air.
11
A person can live without food for about a month, but only about a week without water.
156
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
You see your nose at all times, your brain just chooses to ignore it.
30