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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.