Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Medication errors are three times higher among children and infants than with adults.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
Development of epithelial appendages
Prenatal development in humans.
Syntax Allows Us to Understand Language by the Organization of the Words