There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.