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Did you know?

The average adult has about 21 square feet of skin.

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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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People about to have surgery must tell their health care providers about all supplements they take.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Coleman's parabiosis experiments revealed a satiety factor in wild-type mice that was absent or Coleman's parabiosis experiments revealed a satiety factor in wild-type mice that was absent or
A full-term pregnancy. Image illustrates position of the fetus and the structures associated with pr A full-term pregnancy. Image illustrates position of the fetus and the structures associated with pr
Major causes of biodiversity loss Major causes of biodiversity loss
These findings are from Colby and Kohlberg's long-term longitudinal study These findings are from Colby and Kohlberg's long-term longitudinal study
Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri Loss of brain cells in a transgenic Huntington-disease mouse. (a) Section of normal mouse-brain stri
Type of entry grade 1 Type of entry grade 1
Video: Graded potentials - electrical characteristics and types

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