There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
The pH scale and the relative acidities of common substances