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
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
A person can live without food for about a month, but only about a week without water.
156
In one day, adult lungs move about 10,000 litres of air.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118


