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Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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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.

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Properties of the Magnocellular, Parvocellular, and Koniocellular Divisions of the Visual System Properties of the Magnocellular, Parvocellular, and Koniocellular Divisions of the Visual System
The conduction system of the heart. The conduction system of the heart.
Disorders and Diseases of the Endocrine System Cont Disorders and Diseases of the Endocrine System Cont
Clip-on adapters are used with an ignition system that uses an integral ignition coil. Clip-on adapters are used with an ignition system that uses an integral ignition coil.
Muscular system Muscular system
Sensory systems and Endocrine system Sensory systems and Endocrine system
Video: Autonomic Nervous System Animation

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