1.
A red blood cell can
circumnavigate your body in less than 20 seconds.
2.
Nerve Impulses travel at
over 400 km/hr (25 mi/hr).
3.
A sneeze generates a wind of
166 km/hr (100 mi/hr), and a cough moves out at 100 km/hr (60 mi/hr).
4.
Our heart beats around
100,00 times every day.
5.
Our blood is on a 60,000-mile journey
6.
Our eyes can distinguish up
to one million colour surfaces and take in more information than the largest
telescope known to man.
7.
Our lungs inhale over two
million litres of air every day, without even thinking. They are large enough
to cover a tennis court
8.
When we touch something, we
send a message to our brain at 124 mph
9.
We exercise at least 30
muscles when we smile
10.
We make one litre of saliva
a day.
11.
In one square inch of our
hand we have nine feet of blood vessels, 600 pain sensors, 9000 nerve endings,
36 heat sensors and 75 pressure sensors.
12.
The stomach’s digestive acids are strong enough to dissolve zinc. Fortunately
for us, the cells in the stomach lining renew so quickly that the acids don’t
have time to dissolve it.
13. Human bone is as strong as
granite in supporting weight. A block of bone the size of a matchbox can
support 9 tonnes – that is four times as much as concrete can support.
14. The largest organ in the body
is the skin. In an adult man it covers about 1.9m2 (20sq ft). The skin
constantly flakes away – in a lifetime each person sheds around 18kg (40 lb) of
skin.
15. In 30 minutes, the average
body gives off enough heat (combined) to bring a half gallon of water to boil.
16.
A single human blood cell takes only 60 seconds to make a complete
circuit of the body.
17.
When you blush, your stomach lining also reddens.
18.
The life span of a taste bud is ten days
19.
It's impossible to sneeze with your eyes open
20.
Give a tennis ball a good, hard squee ze. You're using about the same
amount of force your heart uses to pump blood out to the body.
21.
Babies start dreaming even before they're born
22. Your
eyeballs are three and a half percent salt.
23. It
takes about 20 seconds for a red blood cell to circle the whole body.
24. Human
teeth are almost as hard as rocks
25. You
burn more calories sleeping than you do watching T.V.
26. Right-handed
people live, on average, nine years longer than left-handed people do.
27. Your nose and ears continue
growing throughout your entire life.
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