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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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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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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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The familiar sounds of your heart are made by the heart's valves as they open and close.