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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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The average adult has about 21 square feet of skin.

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Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to Three Tasmanian devils feeding. Eating is a social event for the Tasmanian devil, and groups of 2 to
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Video: Polymerase chain reaction PCR - Animation

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