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| 1. |
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.
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| 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 ! |
| 4. |
A red blood cell can circumnavigate your body in under 20 seconds. |
| 5. |
Nerve Impulses travel at over 400 km/hr (25 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). |
| 7. |
Our heart beats around 100,00 times every day. |
| 8. |
Our blood is on a 60,000-mile journey. |
| 9. |
Our eyes can distinguish up to one 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. They are large enough to cover a tennis court. |
| 11. |
We give birth to 100 billion red cells every day. |
| 12. |
When we touch something, we send a message to our brain at 124 mph |
| 13. |
We exercise at least 30 muscles when we smile. |
| 14. |
We are about 70 percent water. |
| 15. |
We make one litre of saliva a day. |
| 16. |
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. |
| 18. |
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. |
| 20. |
A person can expect to breathe in about 40 pounds of dust over his/her lifetime. |