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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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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 first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Primary visual processing areas (blue) in (a) human (lateral and mesial views) and (b) chimpanzee. Primary visual processing areas (blue) in (a) human (lateral and mesial views) and (b) chimpanzee.
One Module of the Primary Visual Cortex One Module of the Primary Visual Cortex
Regions of the Human Visual Cortex and Their Functions Regions of the Human Visual Cortex and Their Functions
Medical Language Medical Language
Different hand positions and working surfaces for massage applications on large muscles. A. Flat ... Different hand positions and working surfaces for massage applications on large muscles. A. Flat ...
Basic massage practice office area. Basic massage practice office area.
Video: Energy inputs and release in glycolysis Animation

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