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The average red blood cell lives for 120 days. 
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.
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 ! 
A red blood cell can circumnavigate your body in under 20 seconds. 
Nerve Impulses travel at over 400 km/hr (25 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). 
Our heart beats around 100,00 times every day. 
Our blood is on a 60,000-mile journey. 
Our eyes can distinguish up to one million colour surfaces and take in more information than the largest telescope known to man. 
Our lungs inhale over two million litres of air every day, without even thinking. They are large enough to cover a tennis court. 
