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Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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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).

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Effects of growth rate on development. Effects of growth rate on development.
The Moon’s Interior and Its Effects on the Moon’s Surface The Moon’s Interior and Its Effects on the Moon’s Surface
How prefixes and suffixes can be combined with a word root to form many medical terms. How prefixes and suffixes can be combined with a word root to form many medical terms.
Summary of the Effects of Massage Cont. Summary of the Effects of Massage Cont.
Identification of the numbers in the Word Problem Identification of the numbers in the Word Problem
Regulatory effects of the vascular endothelium in normal and pathologic states Regulatory effects of the vascular endothelium in normal and pathologic states
Video: Glucagon (glycogenolysis and gluconeogenesis)

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