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Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The familiar sounds of your heart are made by the heart's valves as they open and close.