Aidan+F+-+Wonders+of+Science

WONDER QUESTION: What are bruises?
 * Bruises are usually either green, purple, or brown.
 * Did you know that a black eye is also a bruise?
 * Bruises are painful. They are really just blood vessels that have burst but not broken through the skin. It is a type of minor hematoma.
 * A hematoma is an extravastion of blood outside the blood vessels.
 * Bruises can last up to months if they are severe. But they usualy last a week or two.
 * To treat a bruise you should put a pack of ice on the bruise. This will reduce the blood flow, which will stop it from getting bigger. You should also apply pressure that will slow down the bleeding under your skin.
 * Bumps, as in "bumps and bruises" are pretty much just bumps under your skin.
 * Did you know that your hair is a bunch of long chains of protein molecules?
 * Did you know your hair can grow up to 1/2 inch a month, and in warmer weather it can grow even longer?

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