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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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The horizontal fraction bar was introduced by the Arabs.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.