It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
A vertebrate digestive system, as shown in the human.
Venous System Anatomy
The nervous system is described as having two interconnected divisions: the central nervous system (
Soil as a system
Mammoths – Larger Cenozoic Mammals
A taproot system consists of a large main root together with its lateral branchings