Did you know?
Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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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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There are 60,000 miles of blood vessels in every adult human.
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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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The familiar sounds of your heart are made by the heart's valves as they open and close.
The ovarian and uterine cycles in a human female.
The human embryo
The S-curve in the human vertebral column--a result of the evolution of bipedality--makes humans hig
Human salivary alpha amylase test.
Synthesis and use of glucose in the human body
Structure and function of human teeth.