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Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.