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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).
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Your heart beats over 36 million times a year.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.