The average adult has about 21 square feet of skin.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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There are 20 feet of blood vessels in each square inch of human skin.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
Major Skeletal Muscles
major themes
The major structures of the limbic system: amygdala, hippocampus, cingulate cortex, fornix, septum, ...
Major Wind Systems: Sea and Land Breezes
Interdependence of the Major Organs in Vertebrate Fuel Metabolism