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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).
There are more bacteria in your mouth than there are people in the world.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
The average adult has about 21 square feet of skin.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.