Enamel is hardest substance in the human body.
61
Your thumb is about the same size as your nose.
124
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Our Right Lungs takes more air than our left lung.
194
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
Your body is creating and killing about 2.4 million red blood cells per second.
17
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
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