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There are 20 feet of blood vessels in each square inch of human skin.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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