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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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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.