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Did you know?
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).
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.