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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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Medication errors are three times higher among children and infants than with adults.

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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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