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There are 20 feet of blood vessels in each square inch of human skin.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.