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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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People about to have surgery must tell their health care providers about all supplements they take.
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There are 20 feet of blood vessels in each square inch of human skin.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.