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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
Gunnera growing on nitrogen-poor soil.
An example of a typical incident report.
Structures of a typical cell.
A typical distillation curve. Heavier molecules evaporate at higher temperatures and contain more ...
This typical die grinder surface preparation kit includes the air-operated die grinder and a ...
Typical disposal container for sharps such as needles.