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
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
When you take a step, you are using up to 200 muscles.
886
One human hair can support 3 ounces.
191
Poor eyesight (myopia) is associated with higher IQ.
232
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92