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In 1864, the first barbiturate (barbituric acid) was synthesized.

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All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Managing large bands of grazing animals requires detailed knowledge of local landscapes, especially Managing large bands of grazing animals requires detailed knowledge of local landscapes, especially
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