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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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People about to have surgery must tell their health care providers about all supplements they take.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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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.