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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
There are more bacteria in your mouth than there are people in the world.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.