Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.
Human body organs
Human photopic (cone) and scotopic (rod) spectral sensitivity curves. The peak of each curve has ...
Human eye anatomy.
A Human Element Emerges
The traditional human karyotypes derived from a normal female and a normal male