Did you know?
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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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.