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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).