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The familiar sounds of your heart are made by the heart's valves as they open and close.
To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
On average, the stomach produces 2 L of hydrochloric acid per day.
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