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.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
Elements Found in Organisms
Visual Elements of Pictorial Expression: A. Carpet Page from the Lindisfarne Gospels