General info about Human Body
§ 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.
