In one day, adult lungs move about 10,000 litres of air.
11
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
Enamel is hardest substance in the human body.
61
Your thumb is about the same size as your nose.
124
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