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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
Did you know?
Cyanide works by making the human body unable to use oxygen.
Did you know?
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.