The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.
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The average adult has about 21 square feet of skin.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
Lungs: RUL = Right Upper Lobe, RML = Right Middle Lobe, RLL = Right Lower Lobe, LUL = Left Upper Lob
Structures of the Abdomen: Posterior View
Ventral View of the Spinal Cord
This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f