Can you feel the pulse in your wrist?
For humans the normal pulse is 70 heartbeats per minute. Elephants have
a slower pulse of 27 and for a canary it is 1000!
If all the blood vessels in your body were laid end to end, they would reach about 60,000 miles.
Lincoln probably had a medical condition called Marfanís syndrome. Some
of its symptoms are extremely long bones, curved spine, an arm span
that is longer than the personís height, eye problems, heart problems
and very little fat. It is a rare, inherited condition.
In one day your heart beats 100,000 times.
Half your bodyís red blood cells are replaced every seven days.
By the time you are 70 you will have easily drunk over 12,000 gallons of water.
Coughing can cause air to move through your windpipe faster than the speed of sound ó over a thousand feet per second!
only cause disease, right? But a common bacterium, E. Coli, found in
the intestine helps us digest green vegetables and beans (also making
gases Ė pew!). These same bacteria also make vitamin K, which causes
blood to clot. If we didnít have these germs we would bleed to death
whenever we got a small cut!
It takes more muscles to frown than it does to smile.