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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
Blood is approximately twice as thick as water because of the cells and other components found in it.
Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
On average, the stomach produces 2 L of hydrochloric acid per day.