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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

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Illicit drug use costs the United States approximately $181 billion every year.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Phlebotomy. In this common procedure, a syringe needle punctures a vein, usually in the arm, and wit Phlebotomy. In this common procedure, a syringe needle punctures a vein, usually in the arm, and wit
Common phlebotomy issues. Common phlebotomy issues.
Common phlebotomy issues. Common phlebotomy issues.
The upper intake manifold, often called a plenum, attaches to the lower intake manifold. The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
Cutting Strip Loin Steaks (1 of 5) Cutting Strip Loin Steaks (1 of 5)
Differences between Artery and Vein Differences between Artery and Vein
Video: Muscle Twitch and Muscle Tension - Motor unit size and force

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