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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

These school-age childrean are eating a health snack These school-age childrean are eating a health snack
Health promotion Health promotion
The proportion of men and women with elevated blood pressure or taking hypertension medication incre The proportion of men and women with elevated blood pressure or taking hypertension medication incre
Review of Health and Illness over the Adult Years Review of Health and Illness over the Adult Years
A partnership between the patient and the health care provider. A partnership between the patient and the health care provider.
What do epigenetics do for our health? What do epigenetics do for our health?
Video: Introduction to filtration - filtrate formation and composition

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