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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).
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Illicit drug use costs the United States approximately $181 billion every year.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.