Your thumb is about the same size as your nose.
124
Our Right Lungs takes more air than our left lung.
194
The average sperm cell swims at 8 inches per hour.
76
When you take a step, you are using up to 200 muscles.
886
It takes about 20 seconds for a red blood cell to circle the whole body.
102
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
Yawns are more contagious among people with closer relationships.
163