Vaccines prevent between 2.5 and 4 million deaths every year.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The two major categories of postsynaptic receptors.
Eye Color Is a Sex-Linked Trait in Drosophila (Part 4)
Major parts of a kidney
Diaphragm, the major muscle of breathing.
Phylogenetic tree based on the distribution of 120 alleles in 42 populations from around the world,