If you could remove all of your skin, it would weigh up to 5 pounds.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Continuous variation in a polygenic trait.
True-color image of layers of haze in Titan's atmosphere.
True Friendship
A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ...
An example of continuous variation: biology students organized according to height.