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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Did you know?
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.


