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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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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

Compartments within (a) animal and (b) plant cells Compartments within (a) animal and (b) plant cells
Communication between mating yeast cells. Communication between mating yeast cells.
Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic
The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve
Totipotent stem cells Totipotent stem cells
Video: Resting membrane potential - electrical polarity and maintenance requirements

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