In one day, adult lungs move about 10,000 litres of air.
11
Yawns are more contagious among people with closer relationships.
163
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
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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