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Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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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.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Oxygen dissociation curve Oxygen dissociation curve
A cross-sectional view of a typical zirconia oxygen sensor. A cross-sectional view of a typical zirconia oxygen sensor.
Oxygen-binding curve for myoglobin Oxygen-binding curve for myoglobin
GDP per Capita versus Carbon Dioxide Emissions per Capita GDP per Capita versus Carbon Dioxide Emissions per Capita
Carbohydrate Metabolism Carbohydrate Metabolism
The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left The heart and its major blood vessels. Oxygen-rich blood is pumped from the lungs to the left
Video: Stroke volume - contractility definition

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