There are more nerve cells in one human brain than there are stars in the Milky Way.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
The peripheral nerves connect the brain and spinal cord to other parts of the body.
Parts of a bone.
Sections of Cylindrical Parts
Parts of a syringe.
How to choose the correct u and dv when you integrate by parts