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 human body produces and destroys 15 million blood cells every second.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The FDA recognizes 118 routes of administration.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Masters and Johnson’s Four-Phase Model of the Sexual Response Cycle
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