Interesting general info about the human body

**Julia Kimber** · 10-09-2005, 05:44 AM

- Our heart beats around 100,000 times every day.

- Our blood is on a 60,000-mile journey.

- Our eyes can distinguish up to one million color surfaces and take
in more information than the largest telescope known to man.

- Our lungs inhale over two million liters of air every day, without even
thinking. They are large enough to cover a tennis court.

- Our hearing is so sensitive it can distinguish between hundreds of
thousands of different sounds.

- Our sense of touch is more refined than any device ever created.

- Our brain is more complex than the most powerful computer and has
over 100 billion nerve cells.

- We give birth to 100 billion red cells every day.

- When we touch something, we send a message to our brain at
124 mph.

- We have over 600 muscles.

- We exercise at least 30 muscles when we smile.

- We are about 70 percent water.

- We make one liter of saliva a day.

- Our nose is our personal air-conditioning system: it warms cold air, cools
hot air and filters impurities.

- 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.