The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Your heart beats over 36 million times a year.
One-dimensional NMR spectrum of a globin from a marine blood worm
SHEEP HEART
Heart
Blood glucose monitor.
Myocardial Oxygen supply and demand
The proportion of men and women with elevated blood pressure or taking hypertension medication incre