Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs.
Examples of cell types derived from ectoderm, mesoderm, and endoderm.