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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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There are 60,000 miles of blood vessels in every adult human.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.