Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
The tundra at the base of the Torngat mountains in Labrador consists primarily of low-growing mosses
The testes. In addition to producing sperm, the testes secrete the male sex hormones, primarily test
Energy homeostasis is regulated primarily by the brain, gastrointestinal tract, other organ systems,