1. 
The
average red blood cell lives for 120 days.
The
average red blood cell lives for 120 days.
2. 
There
are 2.5 trillion (give or take) of red blood cells in your body at any
moment. To maintain this number, about two and a half million new ones
need to be produced every second by your bone marrow.That's like a new
population of the city of Toronto every second.
There
are 2.5 trillion (give or take) of red blood cells in your body at any
moment. To maintain this number, about two and a half million new ones
need to be produced every second by your bone marrow.That's like a new
population of the city of Toronto every second.
3. 
Considering
all the tissues and cells in your body, 25 million new cells are being
produced each second. That's a little less than the population of Canada
- every second !
Considering
all the tissues and cells in your body, 25 million new cells are being
produced each second. That's a little less than the population of Canada
- every second !
4. 
A
red blood cell can circumnavigate your body in under 20 seconds.
A
red blood cell can circumnavigate your body in under 20 seconds.
5. 
Nerve
Impulses travel at over 400 km/hr (249 mi/hr).
Nerve
Impulses travel at over 400 km/hr (249 mi/hr).
6. 
A
sneeze generates a wind of 166 km/hr (100 mi/hr), and a cough moves out
at 100 km/hr (60 mi/hr).
A
sneeze generates a wind of 166 km/hr (100 mi/hr), and a cough moves out
at 100 km/hr (60 mi/hr).
7. 
Our
heart beats around 100,00 times every day or about 30 million times in
a year.
Our
heart beats around 100,00 times every day or about 30 million times in
a year.
8. 
Our
blood is on a 60,000-mile journey per day.
Our
blood is on a 60,000-mile journey per day.
9. 
Our
eyes can distinguish up to ten million colour surfaces and take in more
information than the largest telescope known to man.
Our
eyes can distinguish up to ten million colour surfaces and take in more
information than the largest telescope known to man.
10. 
Our
lungs inhale over two million litres of air every day, without even
thinking. Their surface area is large enough to cover one side of a
tennis court.
Our
lungs inhale over two million litres of air every day, without even
thinking. Their surface area is large enough to cover one side of a
tennis court.
11. 
We
give birth to over 200 billion red cells every day.
We
give birth to over 200 billion red cells every day.
12. 
When
we touch something, we send a message to our brain at 124 mph
When
we touch something, we send a message to our brain at 124 mph
13. 
We
exercise at least 36 muscles when we smile.
We
exercise at least 36 muscles when we smile.
14. 
We
are about 70 percent water.
We
are about 70 percent water.
15. 
We
make around 1 to 1.6 litres of saliva a day.
We
make around 1 to 1.6 litres of saliva a day.
16. 
Our
nose is our personal air-conditioning system: it warms cold air, cools
hot air and filters impurities.
Our
nose is our personal air-conditioning system: it warms cold air, cools
hot air and filters impurities.
17. 
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.
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.
18. 
We
have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and
silicon in our bodies.
We
have copper, zinc, cobalt, calcium, manganese, phosphates, nickel and
silicon in our bodies.
19. 
It
is believed that the main purpose of eyebrows is to keep sweat out of
the eyes.
It
is believed that the main purpose of eyebrows is to keep sweat out of
the eyes.
20. 
A
person can expect to breathe in about 45 pounds of dust over his/her
lifetime.
A
person can expect to breathe in about 45 pounds of dust over his/her
lifetime.
