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Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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The average office desk has 400 times more bacteria on it than a toilet.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.