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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).

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There are more sensory neurons in the tongue than in any other part of the body.

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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

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The average office desk has 400 times more bacteria on it than a toilet.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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