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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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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.