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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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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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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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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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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.